How We Know So Much About Planets That Are Super Far Away
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- čas přidán 19. 02. 2015
- NASA's Kepler Space Telescope has discovered the densest exoplanet yet, but how can we determine the mass of a planet that is so far away?
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Astronomers discover rare planet: Kepler-432b is a dense, massive celestial body with extreme seasons
www.sciencedaily.com/releases/...
"Two research groups of astronomers have independently of each other discovered a rare planet. The celestial body, called Kepler-432b, is one of the most dense and massive planets known so far. The teams report that the planet has six times the mass of Jupiter, but about the same size. The shape and the size of its orbit are also unusual for a planet like Kepler-432b that is revolving around a giant star. In less than 200 million years, this "red giant" will most likely swallow up the planet."
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This stuff absolutely amazes me! Can you imagine traveling around the universe discovering new planets, stars and what kind of things they may have that can benefit us? Not forgetting the chance of finding life. Sometimes I get annoyed that I am around at this time. I would love to be around in the next thousand years or so once we get the hang of traveling to vast areas of the universe. Its just mind blowing.
We two (and others) are quite similar! ^_^
LARSFSO I am one of those others.
Exantrn Ditto
Exantrn Great! ^_^
It's a shame that everything about science and space is reported by a really slow boring unexciting English Southerner, This is the reason why the youth feel so incredibly dis-interested! It irritates me the most as I think everybody should follow the saying "Scientia sit Potentia" which translates from Latin to "Knowledge is Power".
I've always had this question. How can know alot about a planet when it's so far away you can barely identify that it even exists. Sounds like a whole lot of guess work to me.
Yes how can they even talk about galaxy and universes when we can't even travel to Mars 🙂
I feel like a lot of science space fanatics go overboard with lies.
@@Star-bp5jj you’re not wrong there
im pretty sure its just scientists desperately want their names in books
Yall sound like flat earthers rn
you guys should post about space more often
Jonas Cabral I can understand him fine...
I host my own tiny space show :D Allthough it's not that good.
KerbalEssences cool, ill go check it out.
KerbalEssences You have a Kerbal for your profile pic, can't be that bad XD
KerbalEssences Your channel is awesome.
I love how perspectives change within different fields, 200 million years = not so distant future
Robotics/nanotechnology, 50 years = the end of the world.
omg bevan 😭♥️
I'm SO fascinated by new discoveries about exoplanets too!
I love learning about Exo-planets, but there's one thing that’s been bothering me… Let’s say were looking at a star about 100 light years away and we can see its planets. But were looking at that sun as it was 100 years ago meaning the sun and planets would have changed. Not much I know, but when we’re dealing with a star 10-T or 10-M L-Years, that's a bigger time frame. So what would we do if we find a planet that’s orbiting a dyeing star or a planet that could have water on it, that was a long time ago and things could have changed, right?
Not much that is relevant can change in a 100 years. Take a look at the Earth, sure humans changed a lot in the last 100 years, but did the Earth? No, it is still habitable, covered in huge amounts of life in the oceans and land, the atmosphere is virtually unchanged etc..
That's true, I was just thinking, like what happened to Mars. Also what would we do if humans were able to go to that planet and all we had to go on was from what we saw, things could be different.
Very useful video.
I've always wondered how they get these measurements
Please more of this. I absolutely love it.
I think Dnews should have more episodes like this. Not necessary about space, but about explaining how scientists get the answers they give about things.
Very cool. Our galaxy is amazing, mysterious and unfathomably large
My favorite Exo-Planet is the made entirely out of diamond and when I heard about it I was astonished!
well....... maybe its weird but diamonds aint rare at all here on earth their like coal ^^
I love the animation of the planets at the end of the video. Was the animation made for this video only or is there A link where I can go watch it looks pretty cool
Very cool I must say
Yes... 200 000 000 years is "not so distant future"
In the scale of the universe it's not that far away. In human perspective its unthinkable.
I mean, it's a short time when you're dealing with the scale of the universe.
Do more on planet discoveries!
There was a book a read where the earth got overpopulated, and polluted, and just destroyed, so millions of people flew to different habitual planets and created many diverse civilizations on them.
I love his voice!
Quite Amazing
it would be interesting to catch the exoplanet the moment it becomes star food.
Even when it happens, it'll probably be a long and slow process that I doubt anyone would stick around to watch :P
SinerAthin it wouldnt take that long and i would watch it.
Kepler 22b is my favorite one currently.
I wonder how a telescope can see that far it’s mind blowing
It's not actually showing you the planet, it's showing you the light imprint that the planet is giving off. Basically you are seeing the planet as it was in the past.
To put this into perspective, lets look at our Sun. The light from the Sun takes 8 minutes to reach us, because light travels over time. So if the Sun were to suddenly disappear, we would only know about it 8 minutes later when the sky suddenly turns black.
It's the same for these far away planets, only that the farther away they are, the older the light imprint is, and we are literally looking at the past.
1:30 but how do we know wich planet in a solar system causes this wobbling?
Bollocks. I love how this guy presents himself as if he really knows what he is talking about. No matter how many telescopes they put out there, there is no way astronomers would in any measure know of how large, how far, what a planet consists of, and whether are not life exist on other planets. The distances are just too incomprehensible to man.
I wanna know how do they see planets from other galaxies it they are light years away
While *technically* true the methods they use to measure such distances have been extremely accurate. The only chance that they’re wrong would require math to work completely differently outside our solar system. Which is incredibly unlikely.
I wonder if Ian plays Elite: Dangerous.
He certainly fits the type.
I know plenty of astronomers play the game simply to visit stars that they've studied in real life.
Your accent just keeps reminding me of hitchhikers guid to the galaxy
This radial velocity method seems like a large degree of conjecture. He states that it is used to measure the planet's mass by examining the star's wobble as the star pulls on the planet and the planet pulls back on the star. This sounds nice in theory, but how do we know that the wobble is not caused by other factors like additional planets in that star system that have yet to be detected or other phenomena? I love science which is why I teach it... but too much innuendo passes for science nowadays without sufficient reproduceable laboratory evidence.
Coooool!
The thing what makes me curious - How do we know the planets are still there if what we see through the telescope is thousands or even billion years in the past. Many things could have changed before the light reached telescope.
You should talk about the large planet that obits so close to it’s star
With that star being a red giant I imagine it was possibly hosting life sometime in its lifespan.
Watching this video in 2020 , 2nd April
Although I have my doubts about how the composition of a planet is determined within our solar system, at least we can see them. While I understand determining the size of an exoplanet, I'm not buying how their composition is determined since we can't see them. It's arrogant to say that the standard we set here on earth applies to the entire universe.
See I always thought it was a mandatory creative writing class everyone at NASA had to take.
How about a planet's weather? and colour am curious
If you must know Ian, Kepler-438b seems like a baller exoplanet.
Nice
Why does UV light make things glow?
How do we know what happens on these planets such as heat or stone rain
while i was watching this video i felt a earth quack i was like did aliens shake my bed just now :o
Might be a dumb question, but how can you precisely measure the position of a star, when most of them are supposedly wobbling? What's your reference frame?
That's not a dumb question. We can't see a star wobble directly; they are too far away. Scientists examine small changes in the color of a star, its spectrum. When a star moves towards the earth, or away from it, the Doppler Effect changes the spectrum. This same effect causes the sound of a vehicle to change as it moves toward you, or away from you.
So we are not seeing the star move side to side, but we can determine how fast it is moving directly towards or away from us. This allows us to calculate the mass of an exoplanet.
Eric14492 thanks for the enlightening answer, I didn't think about the doppler effect :)
Riccardo Miccini you're welcome
@@Eric14492 I might be 7 years late but I'll ask anyways. So how can we tell the weather on other Planets millions of light years away when our own Hubble Telescope has blurry images of Pluto. I will see these documentary talking in detail about the contents and crazy weather of other planets as if it was an observed fact. Is there legit explainable way we know about Planets Million of LY away or is it lies.
I'm still confused to how people can see other planets clearly, yet we couldn't get a clear picture of Pluto. Can someone explain that logic to me please?
Cause most of these things are based on guesses and theories
When was the question answered exactly?
1:10
my favorite is Glisa 581-C
Definitely the gliese systems they have the some of highest values similar to earth
But how do they know the mass of the star? Because you can only know a planets mass using the wobble of the star if you know the star's mass right?
If the mass of planet is measured by wobbling of star then how can they distinguish the amount of wobble caused by one planet and another?
I mean there are more than one planet in a solar system.
Can we call the exopplanet Senpai because of its extremely high denseness?
Since its so far away, how do you know the planet isn't already destroyed and the light just hasn't reached us yet?
Are people who live in cold climates healthier?
What I would like to know is how they presume to know what exoplanets are made of. I understand them determining the mass, size, probable temperatures, and so on, but how composition? For example, there are planets where they claim to know they are covered completely in water and at the bottom of its massive body of what is ice. How could they possibly know that? Other planets they claim blow storms of glass "sideways". Others made of diamond.. Again, I understand they can tell relative mass, size and orbit, but how can scientists seem to speculate so surely on composition and whats in its core, or that its a rocky mountain planet.. If anyone could elaborate without speculating themselves, Id be grateful.
It's all assumptions kid ..Not real facts as u may know as light needs time to travel from these distant objects to our planet so if we caculating or describing a planet we observe now is the same planet which was Billions of yrs earlier so it's almost impossible to calculate how it looks today as it may even not exist today
Is your shirt on inside-out?
Is it better to have our lives mean everything or mean nothing?By every thing I mean ever time we do something it has a major impact on something else and by nothing I mean, anything we do has no impact on anything?
Why are all planets shaped alike? And how come we cant see the actual photos?
Because the actual photos are like a few pixels
That's assuming the pull is the same that many lightyears away
Why have NASA not fired the guy who comes up with planetary names yet?
Astronomers could be wrong, they study the lights that they can’t reach, just watching through glasses. It just a belief.
Yeah thank you for the information but how do we discover planets that are 100+ light years away again?
Transits, mainly. 1:01
Well my favorite exoplanet isn't actually a planet, is a moon, one of Jupiter ones called Titan!
scientists was pretty exited when they discovery that this moon is earth like in size and have one atmosphere surrounding it.
so I through maybe is suitable to sustain life, well again is a big if
let me know what you think, did you already knew about Titan?
thanks lot Dnews
I guess you call that planet hell right :v?
By the way what ever happen to all that jazz about Planet X? Has that died down now? I don't remember if Dnew ever made a video about it or made fun of it?
They can make up all kind of stuff and nobody else has the funding to prove them wrong.
Anyone notice how inaccurate the captions are?
Edit: Its worse in older episodes
Fun fact: we only found 0.000000000000000000000001% of the universe
I love science fiction
Fahrenheits for discussing astronomy? Really?
Oh my god
This exo-planet has a very superman origin story vibe to it.
We must hurry up and explore it then before it gets eaten. I mean, at this pace, it'll take 200 M years before we can reach other stars... =P
I don't understand, doesn't it take millions of years just for the light to reach our telescopes... so what are the odds we can travel to those planets any time soon, with a method that can get us there in a life time and of course at the end of all things expect to see life-forms and a habitable planet? I'm betting real low odds
Once you become immortal you can get anywhere within a lifetime, or at least within our galaxy.
Once they find a planet that might support life, they can get our best telescopes and zoom in on them over extended periods of time detecting different wavelengths of light. We can even build better ones if we're convinced there are signs of life. It is highly likely that there is life within our galaxy, just through sheer number of planets and moons. It's just a matter of whether or not they have a million year history during which they sent signals or left large traces of their presence. If they did, we could immediately learn some things about them from what we detect to be on their planet, and it would likely be a cultural revolution just from the proof of life.
Extremely dense... Hur hur hur
like totally super far away
EXOplanets... I'm trying REALLY hard but I can't not think of EXO!
lol i see what you did there with the rubik's cube this time
Can you get sick by being in the cold?
What if Kepler 432b was one the home planet of some race, and they ran away? That'd be awesome.
oh no!! WE MUST SAVE 432b NOW!! QUICKLY PUT 10000000 SUPER JETS ON IT!!!!!! WE MUST SAVE IT!!!
That's a lot of super jets
I believe you humans still have much to learn.
I still don't get why they choose this locutor... I can barely understand him..
Having a shirt that isn't inside out definitely helps with credibility
You look like a regular-sized Peter Dinklage.
Does the Sun wobble?
Kepler 22b is a planet that we could possibly colonize.
is this guys shirt inside out?
SAVE KEPLAR!
KEPLER!
Is his shirt inside out?
Earth
Hey, dude. You shirt is inside out.
Thanks :)
Vageta
I meant ish1332
Is he wearing his short inside out?
And they wonder why women are not good at all in science.
He didnt answer the question at all.
He said we get the size by how much light it blocks, and the mass from how much it makes the star wobble. He could've gone into more detail about the second one, but he absolutely answered the question.
My favourite is 833 Monica - a minor planet. Of obvious reasons :p
A planet where Athiests dont comment would be nice
To be more precise:
A planet where atheists don't comment about religion for no reason would be nice.
There's a difference.
dzarko55 I would prefer a world where people don't believe lies about said world. Such as your magic sky man.
doomlord117 don't assume things. I'm an atheist. I just don't like it when other atheists randomly comment about religion when no such comment is necessary (such as when there is no religion mentioned in a video). There are forums for that.
So I didn't want to disagree with OP, but I felt he was a bit ambiguous, so I clarified.
dzarko55 You really don't have to clarify for a person the wants people with an opposing opinion to remain silent. Nor should you as that attitude is a dangerous one.
A planet where a youtube comments section has no religious fights at all would be nice.
The way this guy says the Ss is so intense... Like some sort of whistle! The whole talk just sounded like SSSSS to me. Pretty annoying. Did anybody else feel the same? - like he was sort of whistling all the time?
Than again, it might be that the sound capturing is to blame, not him, I don't know.
Lol well then how do we know the density and size of the star?
Life is a paradox.
God created the world (who created him/her?)
The Big Bang happened right? Who created the hydrogen and everything else?
I'm a tree.
I don't have tines to explain this, go to Wikipedia, read the big bang article and then you'll understand how hydrogen is formed
You're assuming anything needed to be "created,"
mdr48371 you sir have a good point, hydrogen and all other elements are formed after the big bang, not created.
"Who created the hydrogen and everything else?"
Nucleosynthesis. Happened 14 billion years ago. Happens today.
1 element turns into another.
Ohh so y’all are guessing
>200 million years.... yeah not so distant -_-
Sir how do scientists know that what's going on , on a planet
So how can we tell the weather on other Planets millions of light years away when our own Hubble Telescope has blurry images of Pluto. I will see these documentary talking in detail about the contents and crazy weather of other planets as if it was an observed fact. Is there legit explainable way we know about Planets Million of LY away or is it lies.
Am i the only one who felt bad for the planet. You know, cause he is going to get destroyed and all.