Is Mars Worth Exploring, Imaging Our Galaxy, Rogue Planets | Q&A 244
Vložit
- čas přidán 26. 06. 2024
- How can we possibly know how does the Milky Way look like? Is Marth worth further exploration after not finding any life there for years? How can we realistically settle on the Moon? All this and more in the week's Q&A show.
🦄 Support us on Patreon:
/ universetoday
📚 Suggest books in the book club:
/ universe-today-book-club
00:00 Start
00:43 [Andoria] Multiple rogue planets discovered by JWST
04:58 [Vulcan] How did we take a photo of our own galaxy?
08:10 [Risa] Why did The Big Bang not collapse under gravity?
10:13 [Aeturen] Why waste money on Mars?
17:23 [Vendikar] Realistic ways to settle on the Moon?
20:58 [Remus] How to interest kids in space?
23:59 [Janus] Any updated on Artemis?
27:25 [Cait] How can galaxies move away faster than light?
28:30 [Betazed] Black hole naming problem
31:22 [Cheleb] Is Moon better than the ISS?
34:38 [Nimbus] The Zoo hypothesis VS dinosaurs
37:28 [Belos] Will we ever see a proper Neptune mission?
📰 EMAIL NEWSLETTER
Read by 60,000 people every Friday. Written by Fraser. No ads.
Subscribe for FREE: universetoday.com/newsletter
🎧 PODCASTS
Universe Today: universetoday.fireside.fm/
Astronomy Cast: www.astronomycast.com/
🤳 OTHER SOCIAL MEDIA
Mastodon: astrodon.social/@fcain
Twitter: / fcain
Twitter: / universetoday
Facebook: / universetoday
Instagram: / universetoday
📩 CONTACT FRASER
frasercain@gmail.com
⚖️ LICENSE
Creative Commons Attribution 4.0 International (CC BY 4.0)
You are free to use my work for any purpose you like, just mention me as the source and link back to this video. - Věda a technologie
Excellent comments Fraser! I was an amateur astronomer, science-geek 13 year old watching Neil Armstrong setting foot on the moon, absolutely certain that I would someday go there as a scientist. Big disapointment! Later as a NOAA researcher I wintered-over at the Admundson-Scott base at the South Pole in 1982-83. That was my consolation prize, being isolated on an Ice Planet for 9 months with a crew of 20, and enduring the 6-month night.
From my perspective your comments on the prospects of the near-term colinization of Mars are right on Target. No one will want to live there permanently. It is now logistically possible to live at the South Pole indefinately but no one choses to do so. My experience of returning to the Green Planet after a year on the Ice Planet was the most profound day of my life!!
For teaching your kids about space: Start with memorizing the planets. Then teach them attributes of each planets. then move on to dwarf planets then teach about the kuiper and oort cloud. After that pick another topic. My next step was teaching them the periodic table. Tonight we are learning about Terbium :)
next sub atomics , lagrangians and feynman diagrams .
I never learned about lagrangians. Big gap in my education, honestly.
👍Kids absorb information. Keep it interesting and they keep wanting to learn. Teaching them how to learn is important.
Puto is a planet. Not a dwarf.
Lead them to good, "hard" science fiction. Asimov, Clarke, Heinlein, etc.
Aeturen ,
agree,
And attempting to build any kind of self-sufficient structure off planet would be such a challenge it can only give more appreciation and valuable lessons to taking care of our own planet.
11:29 “…a place that’s trying to kill you at all times…”
Pretty much describes everywhere except for a thin layer around Earth. And not even the entire surface of Earth either, bits of it can be really unpleasant. Any space travel, in LEO, MEO, Moon, Mars, Venus, etc, we will have to carve out little pockets of habitability. If ever we do luck into a habitable world, like Star Trek does every episode, we will very likely have ferocious competition from indigenous life.
And if you've been to Australia there's whole continents here trying as well :)
So cool you name dropped Crash Course w Phil Plait! What an incredible series.
Thanks for giving more credit to kids that can understand advanced concepts. They are not limited by the preconceptions that adults project onto them!
At age 3 I knew the names and properties all of the planets. I read books on astronomy, fusion and lifecycle of stars etc at the age of 8 and spent hours and hours and hours in the school/college libraries reading everything I could find. This was in the 60s and 70s before the internet happened.
Don't ever stifle curiosity - a motivated kid that's driven to understand the world around it can achieve true greatness with just a little guidance.
Yup. I often walk young kids through the basics of calculus. Obviously we don’t get into details but the basic concepts aren’t too bad.
Hale bopp was amazing to see. I was a teenager then and i would love to see another comet ☄️ sometime in the near future hopefully
Same. I remember after a few weeks of it a best friend stopping while we were out walking and remarking that it was such an absurdly rare sight but seemed normal already and how one day we’d be old and think back on it. He was murdered by a burglar about five years ago. RIP Jon.
Same. I remember after a few weeks of it a best friend stopping while we were out walking and remarking that it was such an absurdly rare sight but seemed normal already and how one day we’d be old and think back on it. He was murdered by a burglar about five years ago. RIP Jon.
I got to watch Hale-Bopp for almost two years and it was absolutely amazing. The brighter and closer comet was Hyukatake, but it was only visible for several weeks. Not many people remember that one.
@@RockinRobbins13Hale-Bopp was ridiculously bright and was in the sky for soooo long. But C/1996 B2 was GORGEOUS! When it was at its closest, you could just about see it moving against the background stars in a single night.
Two Great Comets in 2 years AND Comet Shoemaker-Levey 9's Jupiter impact. The '90s was a great era for comets.
@@nicholashylton6857 My astronomy club and I were on a university campus showing the public Shoemaker-Levy and Jupiter the night of the impacts. The latest forecasts said the comet fragments would pass around Jupiter to hit the far side.
But we were showing a spot on Jupiter that we thought was the shadow of one of the Galilean Moons. We explained to viewers that if the comet were to hit there, that shadow would be about the right size and appearance. That was our spiel for several hundred people that hight, all who were impressed by the appearance of the planet and comet fragments.
The next morning it was announced that the forecasts turned out to be wrong and the impacts happened on the Earth-facing side of Jupiter. We had actually shown several hundred people the impact and misidentified it! Oops.
Aeturen was beautifully articulated
Aeturen. I loved your philosophical response to the question, and how you really delved into the viability of terraforming vs preserving and improving our natural home... and the music was perfect to set one's mind into a relaxed and receptive state of mind.
I saw Hale-Bopp faintly even in the late day and at night it was even better to look at. When we see a tail on an object we normally expect that its something that is being propelled by it like when you see a contrail of a jet. But a comet is kind of eerie because it just hangs there in the sky while giving the appearance of visible motion because of the tail. I'm sure when a close, bright one comes by again it will be big news. Seeing some fainter ones with binoculars or a telescope is really cool too.
I think instead: Focus on digging into Europa, getting samples from the geysers of Enceladus, and exploring Uranus as future reference to exoplanet study
We need a new definition for rogue planets. They don't orbit stars, and as a result, they also don't meet the condition of clearing other orbiting items in their own orbit.
They fail on two out of three conditions.
Drifting Gas Giants, or DRIGGS.
Woo hoo! A great video just popped up.... Enjoying it now.... 😊
Hi Fraser I love your answer about kids. As a dad of two and a former educator I completely agree. Sometimes my kids completely surprised me with the complexity of the questions they come up with showing that they were in fact able to pay attention and absorb a lot of info.
It is my opinion that the exploration of space and other planets is in fact the key to Earth's environmental health and future.
Mr. Cain, Thank you so much for your videos. They're informative and you explain them in such a way someone like me can understand. Keep em coming please and thank you.
Andoria. Something about the idea of dozens+ of binary Jupiter systems forming close together and just lumbering around out there in chaotic close proximity, in a nebula, really grabs my imagination. Tons of sci-fi potential.
Now I'm excited about the Fermi paradox iceberg video.
OMG, finally a Q&A! There hasnt been one in about a decade.
Remus. This is how the future of space exploration is determined!
Love watching your videos. You have the perfect mix of excitement and joy that makes (generally quite technical concepts) so much fun. Both kids and adults. Great work my friend!
Thanks a lot! Glad you're enjoying them.
Crash Course Astronomy is absolutely amazing! (and the best series they've created imo)
Adding to what you've mentioned, there's also Deep Sky Videos by Brady Haran. I especially like Mike Merrifield's videos there.
Thank you for presenting a clear-eyed view of the difficulties of permanently living on Mars vs having a small research station.
I fear too many people are seeing Mars as a get out of ruining your first planet free card. I’m no expert, but I’d venture to say that earth would still be better than Mars after a nuclear war.
Either way you’re living in the submarine example, but on earth you could still use the air that’s there and breathe it and you would have access to a lot more water.
People don’t think about how paranoid everyone would be about the air system on a mars city. A two hour outage of the oxygen supply, the way we often have power outages due to many variables, would be unacceptable. You would need redundant systems, but that’s lot of your efforts put toward something that’s free on earth.
Q: How do we know the wind speeds of storms on other planets, like Jupiter and Neptune?
Mars Guy is a good channel.
Easily digestible 5 min vids of weekly news from Mars.
Thanks, I'll check it out.
We need a Cassini / Juno level mission to Neptune and Uranus. It is crazy that we have already planned this!!!
Big agree. The same for Uranus too. Both of those planets have been neglected since the Voyager II probe flew by them in 1986 and 1989 respectively. I just *wished* it wouldn't take the best part if *15* years + of flight time just to get to Neptune!
It's a priority for the next round of flagship missions, but nothing's certain yet.
Wonderful video
REMUS Great episode!!
I love your shows!!! And so does my son (who is 10 now). And he is just now getting to the point where he is asking questions that I can't answer, off the top of my head, But we both love jumping into looking for the answers! Kids are amazing!
Thanks!
Remus, Best PSA
Regarding the Remus question, I'm 52 now but I know myself as an 8 year old would love this channel just as much if not more back then.
thanks for the video :)
Belos , also! Thanks to the person asking the question about if a proper mission to Neptune will happen.
Nimbus - Please do an episode to talk about the various Fermi Paradox hypothesis and debunk them
Black holes are black. Black is not a colour. Black is the absence of colour. Colour is a property of light. Light does not escape from a black hole so we "see" the "hole" (a.k.a. region of space that light does not traverse) - and that "hole" is black. Black holes are black, and we "saw" that in both of the "pictures" of the two "black holes" that have been taken to date.
The word "hole" is not the best I suppose but "black" is perfectly fine as a descriptive word.
Bulcan. I've bene wondering this question myslef. Thanks for your answer.
No matter how much we take care of Earth there will always be the looming threat of world ending events, such as asteroid impacts, super-volcanic eruptions, out of control super-viruses.
I don't think we need mars either (or gravity wells for that matter), but at the very least we need to create a self sustaining back up of humanity off Earth which will survive and thrive even if the people of Earth are struck by a true cataclysm.
Since we don't know when cataclysm will strike we really should be pushing for self sustaining space infrastructure sooner rather than later. In the short term, the moon might be a good stepping stone if we can mine it and build spacecraft on it, learn how to make it self sustaining before moving onto bigger projects like asteroid mining, orbital cylinders etc.
14:23 it's good for humanity's sake that not everyone is a giant vaj like Frady Cat Cain.
YES! Mars has all we need not to deplete out resources.
Looking at the binary JuMBO images, they are insane. We are looking at two planets floating around the orion nebula at a scale that is similar to viewing jupiter and saturn in the sky with our own eyes at the right time of the year while standing on the surface of the earth. It is pretty mind blowing to be looking at other planets, not a simulation.
Whoever came up with the name JuMBO absolutely nailed it. This discovery with this technology is huge.
Aeturen 2nd comment: Perhaps someone should open up a tourist like facility on Devon or Cornwallis Island, in the Canadian far north, where folks could book long stays (say 2 to 4 weeks) in total isolation as if on a Mars base. The Mars Society has its Mars Arctic Research Station on northern Devon Island. I'd set it up similarly but for a commercial purpose, with revenues shared with the people of Nunavut and the nearest Canadian Forces station. Let people get their Mars fix, have to endure the isolation, and provide a potential additional source of revenue to the territory. No frills, just fewer risks.
Q: Where are we at with the development of an artificial magnetic field capable of deflecting Solar radiation and GCR enough to protect a human spacecraft or habitat? Is this outside of our current capabilities with modern superconductors? Could they be possibly cooled in space using JWST style sun shields?
Aeturen 🙂👍 Thank you Fraser for another, as always, great video! 🙂 And thanks to the person asking the question about if Mars is not worth it.
The term "DARK STAR" was used before a black hole became a thing. Even in the 60s to early 70s, sci-fi, dark or black star were used to describe black holes.
I saw Hale-Bopp thru a pair of Night Vision Goggles when I was high in the Chugach mountains of Alaska while practicing mountain warfare with the Marines. It was a crystal clear night and with all the stars in the sky, and the comet magnified by the NVGs, it was incredible. Unforgettable.
I've never heard of someone seeing it with night vision, that's really cool.
One of my all-star favorite astrol😮gers
Astronomer, not Astrologer. 😊
Mars would be a great place to mine.
Oh cool Fraser I didn't know you're Canadian. Me too. Your description of how awful Mars is, convinced me I want to experience the hardships! I'm one of the few Winnipegers that absolutely love winter! Obv I want the tech to defeat harsh environments but yeah I'm bald too and I absolutely love the cold here! Keep rocking Fraser!
Welcome to the group! The Canadian bit comes up pretty frequently. 😉
Lol sorry. I do watch a lot of these videos 😉
I do stuff a lot of information in my head so I probably simply re-discovered he's Canadian after forgetting 😛
Remus definetly my favourite question in this one!
How far north do you have to go this year to see an aurora in europe?
I agree with Fraser about living on mars , keep looking for habitable planet with JWST type telescopes from earth ,
It's a great point about terraforming Earth before Mars. I agree. We (collectively) can start doing that today!
It's an absolutely moronic reasoning, all the terraforming in the world won't save us from a carrington level extinction event.
Black holes are just a spherical hole, pretty much. Also, comet neowise was a great bright comet that happened recently, just a few years ago.
I really don't think we will put a man on Mars this century. We may be able to get someone there, but it's the whole physical and mental thing we've yet to overcome.
Super fun good info, I have 8 yo grandson that can explain black holes, am I biased? Sure. But his enthusiasm and the choices he makes are impressive. Great show and I have ammo to challenge him with, thank you.
8:11 Fraser's answer is totally correct, but I have to add the GR perspective to clear the confusion, as the question mentioned the Schwarzschild's radius. There are more reasons why the Universe haven't collapsed on itself: thermodynamics and spacetime geometry, or, to be precise, _space_ geometry. Schwarzschild radius makes sense only in the context of Schwarzschild's solution to the Einstein's field equation (EFE). The EFE is looking deceptively simple: G+Λ=kT, but in fact G, Λ and T are very non-simple quantities, only the k is a constant. First, they live not in space, but in 4D spacetime. Second, they're geometric quantities, but they're not even vectors-they're 2-tensors, one step up from vectors. If you choose a coordinate system, you can describe every vector by 4 numbers. The 2-tensors in EFE become 4×4 matrices when expressed in coordinates. Luckily, they are symmetric about the diagonal, so the EFE turns into “only” 10 simultaneous equations, not 16. Third, there's a little (really little) problem: while these tensors are geometric objects, the geometry they live in is kinda weird: one of the 4 directions in 4D spacetime is not like the others, time is different from space. As a result, the spacetime doesn't have a positive-definite metric of a true Riemannian manifold: the squared “distance in spacetime“ between two points-we call them events-can be positive, zero or negative. The maths is still solid, but things in this geometry are somewhat stranger than in pos-def Riemannian case. I'm not trying to say that 4D geometry can be intuitive, so this is not really a bigger hurdle than it could have been. Fourth, these 10-number matrices are not fixed, they change from event to event. Einstein's tensor G defines spacetime curvature _at every point,_ Λ is proportional to the spacetime metric at every point, and the stress-energy tensor T defines energy densities and fluxes, also at every point. And, since we see not energy, but energy density, the 10 equations generate simultaneous mixed second-order partial differential equations. This is a mathematician's nightmare. Only two dozen or so of exact solutions are known, for the lucky cases when variables can be separated.
There is a second equation, capturing the equivalence principle, but let's not hang on it. What we're solving the equations for? We want to know the geometry of spacetime, so we have to solve them for the metric. But wait, before we try to solve a problem, _we'd better know what the problem is!_ In fact, it can be arbitrary physical setting, and every problem will yield its own solution. This is as well true in Newton's mechanics and gravity. You can solve for the falling of an apple to the ground. Or you can solve for the orbit of the Moon around the Earth. Or you can set up a "dust," a superfluid with a mass density, and, if each dust particle is a star, solve for galactic rotation. The Schwarzschild's problem is set up in a very simple way, in fact the simplest one possible. In otherwise empty spacetime, there sits a never moving point mass M. It cannot even really move: a single point has no reference for motion; spacetime itself arises only as a relation between events. And then, “never moving” implies not only that it doesn't move in space, but also that it's _eternal:_ it has always been there, and will forever be. The Schwarzschild's solution has two well-known singularities in it. One is removable, it's a purely coordinate one, and your choice of coordinates is arbitrary; an infalling observer doesn't see this coordinate singularity. It defines the even horizon, but only as seen by a very far removed observer. But the second one, in the point coinciding with the mass, is non-removable, _essential_ singularity. It will be there regardless of coordinate choice.
And now, think of this: does the early super-hot universe filled with matter and the radiative energy look like the Schwarzschild's setup at all, with its single point mass in the whole spacetime? Absolutely not! Schwarzschild's solution doesn't apply to the whole Universe, it's a solution to a different problem! If we let Λ=0, the EFE simplifies to G=kT. But there is no mass-energy outside of that single point mass in the Schwarzschild's setup, so T=0 almost everywhere, and the equation simplifies further to G=0. But the Universe is filled with matter-energy, so T≠0 everywhere. It's simply wrong to apply Schwarzschild's solution in this physical setting.
The correct solution was developed independently by Friedman in the USSR between 1922 and 1924, and Lemaître in Belgium between 1925 and 1927. The physical assumptions that lead to this solution are Universe's isotropy and homogeneity: there is no preferred direction in space, and the matter-energy density is same everywhere. It is notable that Friedman found out that the Universe cannot be static in 1922, and wrote to Einstein about it, but Einstein stubbornly refused to accept non-static Universe, and rather harshly criticised the 1924 Friedman's paper, where he derived the metric. The solution is based in thermodynamic equation of state, which dictates the relationship between radiation pressure and matter density; GR comes into play only for the derivation of the metric. Lemaître came up with essentially same idea, and also derived the Hubble's law and calculated the estimation of Hubble expansion constant in 1927, in the same paper where he exposed the idea of the Big Bang (“the primeval atom” from which the Universe expanded; the term “Big Bang” was coined much later as derogatory by Hoyle, who never accepted the Big Bang till his death in 2001-science advances one funeral at a time). When Lemaître met with Einstein at the 5th Solvay Conference in the same year, Einstein still refused to accept the expanding Universe argument (literally, "your calculations are correct, but your physics is atrocious"). This was also when Lemaître first learned of Friedman paper from Einstein. Both papers were published in physics journals with little circulation, entirely neglected by astronomers. The metric was rigorously proved as the only possible geometry for an isotropic and homogeneous Universe (regardless of the specific scale factor a(t)) by the mathematicians Robertson in the US and Walker in the UK, after Eddington translated the Lemaître's paper into English. In the end, the FLRW metric, as it became known, is the only admissible one for the whole Universe solution. Whether the Universe is exactly homogeneous and isotropic, we don't know. There may possibly be marginal anisotropy in the CMB signal, very close to the limit of its measurement accuracy. The large-scale homogeneity assumption for the today's mature Universe is also being questioned.
Interestingly, the FLRW solution admits positive (elliptic), negative (hyperbolic) or zero (flat) curvature of _space._ We now know that space is flat, or at least very nearly so. The flatness of space may also be interpreted as the reason why the Universe didn't collapse on itself. After all, we live in flat space, which obviously doesn't show any tendency to collapse on itself into a black hole! The _spacetime_ curvature of the very early Universe was extreme indeed, but its space has always been as flat as it is today: the spatial curvature doesn't evolve with scale/coordinate time in the FLRW solution.
Massive Dark Star is a sufficiently cool and descriptive name.
The evolution of the word nebula provides a nice example of how gaining new knowledge can shape names and concepts over centuries.
Mars is intriguing. My suggestion is to keep space exploration manless. The speed of light C isn’t constant since the measures of time and distance aren’t constant. Changing from 60 kilometers an hour to 60 miles an hour increases your speed. Then if you go from 60 miles an hour to 60 miles a minute it increases your speed again. This what is happening in general relativity when less gravity increases the measure of distance and speeds up the rate of time over large distances. It also means that the earth is younger than what they claim.
I'm not a royalist, but i have to agree with Prince William, when he said `why are we intending to spend billions on populating Mars, when there's so much we have to do to fix our own planet' He's so right!!!! I love astronomy, space exploration and everything to do with the great unknown. But, it's so obvious that, as things stand, we haven't discovered a planet as remotely hospitable as the one we call home. EARTH!!!!!!!!!
RE Aeturen:
the Problem of Mars being a waste of money has an other aspect. think about all the interesting space missions you could finance from the money it costs to put a person on mars (or on the moon for that matter). It is probably not worth it. If your wish list for space missions is not long enough for that conclusion, I can help out.
I remember hale-bop flying by when I was a kid. I was sble to clearly see the tail with my unaided eye. At the time I really had no idea just how rare that was.
It's been surprisingly rare.
Every space mission is worth the money that is invested in it imho. It is always better than spending a trillion per year on weapons and wars like our American friends have been doing for the last twenty years. With 20 trillion you could finance all the possible space missions you want. ❤✌
Remus . I work with high school students building robots, they design it, prototype, 3d print parts, cnc parts, use computer vision and even the some level of AI...Yeah kids will surprize you if you just give them the chance. So awesome advice Fraser. The child will help you find the right level....
I read people who have no interest in science or exploration that claim its a waste of time and money. Those of us that see its value love exploration.
Do we suspect or know of any planetary masses within our solar system that didn't originate within it but were captured? What are some methods that scientists use to determine that?
Andoria!
About the comets. I had a small telescope in my backyard, and we saw halley's comet. It was a small, soft round puff of light. I was so disappointed. I'd grown up hearing stories of Halley's comet in the early 20th century. They said it was so bright it was like daylight in the middle of the night. However, there was a comet i saw in the mid-1960s. I was woken up in the middle of the night, and the comet was hanging in the sky. It filled at least a third of the sky. It was massive and bright. Id love to see another one like that.
Now that's a comet. The Universe has been holding out on us.
I agree with you and 'Savetheplanet', Mars just doesn't seem worth going to or colonizing for any purpose...... at least at this moment in time. 🤔
I think there's a BIG difference between the zoo hypothesis and the prime directive. In one scenario, we're on display for alien life to see and in the other, we're too primitive to be a part of the "federation".
Hi @Fraser here's a question for the next Q&A.
Have you heard of the U.K astronomy/space TV show The Sky At Night? It's one of the longest running shows in the world & on a mainstream network the BBC & its hosts would make a great guest interview how space news is covered. Thanks.
As much as I dislike to, I agree with your take on how little reason there is to live on Mars. Nonetheless, the age old answer to “why” is “because it’s there.” It is in our nature to explore and someone will do it just because. At a bigger scale, Andy Wier got the right answer in Artemis, there will only be a large population in space when there is a real economic driver. It’s easy to forget how many people live nearly permanently on the ocean because they work on an oil rig or cruise ship. Same goes for arctic oil operations.
We Can't Be Alone. Out of all the Stars and Galaxies how could you think we're Alone?
Since the only example of life we have is all here on Earth we can only speculate about elsewhere. Even if the universe is full of life we have no idea how common intelligent life would be. For 99.9% of the history of life on Earth there was no intelligent life. If the asteroid that killed the non avian dinosaurs had missed the Earth we wouldn’t be here and intelligent life might not have arisen.In about a billion years the Sun’s energy will increase so much that the oceans will boil away. So, if something happens to us the window for intelligent life arising here again will close.
You also have to factor in time and the vast distances in the universe. Say intelligent life arose in the Andromeda galaxy but is extinct now. We would never know about them until long after they were or more likely would never know about them. My personal opinion is that extraterrestrial intelligence may exist but due to the distances in space and time we’ll never know about them. So, for all intents and purposes we’re alone.
Aeturen wins the day.
Would it make much sense to use jwst to look more closely at planets in our solar system?
Like getting a good close look at uranus and neptune when theyre at the ideal orientation in relation to the sun and jwst. Is there much to be gained over our current observations?
A term I prefer over the Big Bang is the Everywhere Stretch
The big expansion sounds good
@@petertaylor4758 Even The Ballooning would be more descriptive
Now you've stirred a memory. In Star Trek - The Motion Picture, Spock said, "Voyager 6 disappeared into what used to be called a Black Hole" but never said what it is by the time of the movie. I've always found this to be a bit(!) curious! Memory may be a bit hazy as to the details, it's been a long time since I last saw the movie and even longer since I read the book but it's something along these lines.
Black hole is hands down the coolest name, period.
This all got started because of the Robert Zubrin text , *! , holy cow
Black Holes should be named "Dark Stars" - a bow to the Grateful Dead
i love this bloke's videos so much i made another account so I could subscribe twice.
thanks to both of you.
If you have a very good quality led flashlight running a small plutonium battery turned on and left to drift in space, is it eventually over the span of few years start moving like a photon spaceship? If yes what velocity should we expect?
Janus Question: Had Artemis I been crewed would the issues raised be detrimental to the occupants or were they minor and the delay precautionary?
It is better to have an orbiter, but New Horizons showed us how awesome a simple flyby can be with our current technology. I would definitely be in favor of a flyby of Neptune, and as you said, Triton in particular. After that they can send it past a Kuiper Belt object like they did with New Horizons.
Question: What is the latest on artificial gravity? Are there any efforts to replicate earth gravity on space travel?
Not really. There are talks about doing it on future Mars mission, but no plans other than rough ideas.
Like everything in spaceflight it's hard and it would add a whole new level of complexity to a mission.
No ads... sign up for...
Nimbus because I really want that Fermi paradox iceberg video
For me, a Neptune mission, an orbiter/lander combo like Cassini/Huygens, or even something like Galileo and it's atmospheric probe that plunged into Jupiter's clouds in the 1990's, is a must for me.
Even beyond the increasing interest in the ice giants as missions like TESS and Kepler have found so many of them around other stars, just the captured Kuiper Belt "moon" that is Triton would reason enough to send a dedicated orbital mission back to that region of space again.
The other moons in Neptune's gravitational grasp are also worthy of further exploration, with all of those seen (and indeed discovered) by Voyager II during it's 1989 flyby, other than Triton, being nothing more than poorly resolved and blurry shapes hanging in the black of space. Surely we'd want to learn more about how these moons were created, how they relate to Neptune's weird rings and ring arcs, and ultimately their relationship with Triton itself, as many planetary scientists believe that those moons orbiting inside of Triton came about from the rubble of older moons smashed apart in the chaos of Triton's gravitational capture into Neptune's sphere of influence.
Aeturen for me.
Space Engine Universal Sandbox and a simple telescope to name a few. Space Engine is really amazing imo. Issac Arthur is a good channel as well
Entangled travel is the way to go However, who will show us how?
We often speak of "dust", as in IR's ability to see through it. But what is "dust"? When does it qualify as "dust" vs. a "rock" or other object?
What is a he escape velocity of Milky Way galaxy?
Andoria gets my vote.
Even though dark matter and energy are not accounted for the possibility of an enriched model of mass distribution is certainly interesting. Shorter steps to the other stars?
That's what really fires my imagination. There could be rogue planets much closer than Proxima Centauri, which could act as stepping stones between stars.
Are / Were there any continents on Mars? What were the major land masses?
Since the northern hemisphere is a few kilometres lower than the southern, it would’ve basically been one big ocean. Olympus Mons was a large island/peninsula (Though Elysium Mons was larger) and the southern hemisphere was one big supercontinent with a few large seas (The Argyre and Hellas seas). However, so far as we can tell, it never developed true continental plates.
Atlas Pro has an excellent video on Areography (Martian equivalent of geography), plus ones for Venus and I think the moon.
Does the Great Tractor orbit the Great Trailer or is it the other way around?
[Nimbus] When talking about the fermi paradox, for me its distance. and distance is time really. And math talks the truth in this. In a universe that is infinate, the chance of there being another earth is bigger than 0. its just too far away, or happening at a moment in time when we weren't online yet or when we become extinct.
dose alpha centauri oribit the center of the galaxie at the same speed as eart if not what keep it at the same distance from earth .
Your why waste money on Mars comments were well put. I have been dreaming about artificial gravity space colonies for much of my life. It still looks possible and you're right, it would be better than Mars or the moon as a new place to live for a long time. Best topic.
8:00 We'll likely find a way to reconstruct a mirror-like image of Milky Way from extremely high resolution observations of black holes outside of the Milky Way in less than a million years.
I seen Halley's comet ☄️ it was beautiful and t😢here easblue and violet colors to the tail seen it when I was about 12 years old it was right above us when we were driving