Why Won't it Melt? How NASA's Solar Probe will Survive the Sun
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- čas přidán 18. 07. 2018
- NASA's Parker Solar Probe is heading to the Sun. Why won't the spacecraft melt?
Thermal Protection System Engineer Betsy Congdon (Johns Hopkins APL) outlines why Parker can take the heat.
Read more: www.nasa.gov/feature/goddard/...
Music credit: Cheeky Chappy [Main Track] by Jimmy Kaleth, Ross Andrew McLean
Credit: NASA's Goddard Space Flight Center
Genna Duberstein (USRA): Lead Producer/Lead Editor
Rob Andreoli (AIMM): Lead Videographer
Betsy Congdon (Johns Hopkins University/APL): Lead Engineer
Ryan Fitzgibbons (USRA): Narrator
Genna Duberstein (USRA): Writer
Steve Gribben (Johns Hopkins University/APL ): Animator
Brian Monroe (USRA): Animator
Josh Masters (USRA): Animator
Michael Lentz (USRA): Animator
Genna Duberstein (USRA): Animator
Mary P. Hrybyk-Keith (TRAX International Corporation): Illustrator
This video is public domain and along with other supporting visualizations can be downloaded from the Scientific Visualization Studio at: svs.gsfc.nasa.gov/12867
If you liked this video, subscribe to the NASA Goddard CZcams channel: / nasaexplorer
Follow NASA’s Goddard Space Flight Center
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Just fly there at night... duh...
and use a sunscreen with 100 SFP, just in case
Use Sunglasses
Just use an umbrella to block the sun, oh wait...nvm
that's a dead idea.
An Account
Just fly there at night... duh...
'
hi A A...
the sun is keep still activity light on...
front space is a keep white light on...
inside space is a dark as shadow
NASA please teach Apple how to keep their new laptops cool as well. Thank you.
Simple, run your fans from much lower temps and put in some vents
because it's Motherboard And battery made by china , but I don't understand why USA won't make themselves 😐
thought old macs like mine are the only ones that heat up like hell. guess new ones do too?
@@naomiperez7482 New ones are much worse! I've owned every single MacBook they have put out they just get worse and worse. I would shift to Windows but unfortunately I'm into music and the software I use (Logic X) is only compatible with Mac.
We at NASA would be delighted to teach Apple a thing or two. Their platform is horrible.
I was expecting high level of engineering which we won't be able to understand but they cooled it just by basic methods.
Incredible !
😀
👍🏽
🙄🤔
There's no better method.
Just wrap the god'dam thing with a 9.99$ flex tape.
and forget it!
With that protection you can walk on the darn sun
Eric Fartman true
Now thats Massive Protection
Eric Fartman keep the tough stains out
Oh wrong Comercial
1950: Our cars will fly
2018: we did something better, we sent a satellite to the sun!
Blu Wizard
🤦🏻♂️
Blu Wizard that is actually impressive. I sense sarcasm, but considering how far away the sun is, this is an impressive feat.
If you were actually serious, then silly me, r/whoosh.
Peter Laing I wasn’t joking, im actually impressed.
Blu Wizard that’s a breath of fresh air. This comments section is a little loopy, so apologies for the apprehension.
I hope we don't get flying cars for common people because of the sheer amount of stupid people out there
Watch that thing melt
tax dollars just becoming a liquid goo!
Haha..they're using tinfoils
Watch it not melt. FTFY
I will remember this comment
KwadGamer005
Not long it will get there
*Who would win*
A literally burning ball of fire
*Or*
White paint
LameMonster82 ' I think it is a "literal'
White paint and carbon foam would win
a) it's not a ball of fire because the Sun doesn't burn; it's very hot gas at the surface, and corona is plasma
b) white paint is ceramic and yes, it would win
c) learn some physics, dork
Lajos Winkler learn to take a joke nerd
TinyTurtle ooo watch out +Lajos Winkler
This kid is 12 and is clearly the coolest
I wonder if they’ll also be studying the effects of gravity on time. I know that the scientific community has a solid grasp, based on what we know, of gravity and time. But what new information can this probe reveal in that regard? Who knows what the true purpose and focus of this probe truly is. I think this is far more exciting than the media portrays.
Why dont they just go to the Sun from behind where the Sun is not looking?
gumelini1 brilliant
Cris Angelo D.C they need to do it quietly.And they need to set up a distraction right in front of the Sun.I was thinking about setting up a big speaker and playing Miley Cyrus greatest hits right where the Sun is looking.That should keep the Sun from turning over.Because if it does,well it will be "😨🌑🌒🌓🌔🌝🌡🔥💀" type of situation.
Astronomy isn't a fun ( it's fun, exciting) 😡😡😡😡😤😤
Or go at night
Kyle C now that is a great idea.Go there when the Sun is sleeping
finally! bringing us one step closer to walking on the sun
Android Kenobi best comments ever 😬
You can be the first. Good luck
We'll most likely never walk on the sun unless we can find some super material. The probe isn't even getting as close as most people think it is. The probe will be around 4 million miles away from the sun,compared to the lowest distance from the sun that mercury takes which is 29 million miles
Swimming*
Alex Alford why don't you guys ever get a joke?
If you leave your hand in the oven it will eventually reach the temperature of the oven...
Exactly! I understand the concept of the heatshield, but even when protected from the front heat and solar light, eventually the temperature of the probe will reach the temperature the environment around it... which I guess is not as manageable as she said. Can someone please explain me this?
Adrian, I am not a scientist, but your hand will reach a temperature due to an air. Oven transfers a heat to an air, an air then transfer it to your hand. In space there is no air, therefore maybe it will actually survive. Please someone correct me if I am wrong.
miami, you are correct that since there is no air, there will be no heat transfer by convection, but there will be by radiation. So although it might take more time, eventually the temperature of the probe should reach a thermal equilibrium with the environment around it
Adrian
That's how you cook in the oven, at least I think so...
João Cardoso maybe the cooling system prevents that.
Its amazing to me that people know physics intuitively, but have such a hard time understanding basic concepts. You can put your hand in a 450°F oven and it will not burn because the hot "high temperature" air does not transfer heat (energy) to your cold hand at a high enough rate to burn you (convection ovens use a fan to blast hot air). If you touch the heated internals of the oven, you will get burnt (conduction)! And you may feel more heat from the bottom in the air, versus the top because that is where the heating element/burner are radiating heat. In order, the heat transfer modes are convective, conductive, and thermal radiation.
Would love to see a video showing what the flight path of a solar probe looks like and the shape of its ultimate orbit.
They could save a lot of effort shielding the spacecraft by simply going at night.
*Ba-dum-tss*
Hahaha....that's funny.
I didn't realize and it just came to me.. You know why they don't go at night? Because they cannot see in the dark.
Im dying lol
Lol great joke 😂
It has reached... Wow amazing
Temperature and heat are two different things, wow you learn something new everyday!
Please at least include Celsius as a footnote.
bro...you seriously believe them?
Elton Joel, USA has been using SI (and before SI, metric system) a long time before it landed people on the Moon. It's the general public that's clinging to an obsolete, stupid system, thinking it makes them "free" and special, when it's just making them backwards.
Manned lunar landing was done with SI units working in the equations and in the computer onboard and on Earth.
It's still amazing for me that the only country capable of landing men on the moon uses ancient units.
Elton Joel
On a rocket designed by a German using the Soviet classical rocket equation communicating through the Parkes Radio Telescope in Australia.
Talk about uncultured...
The Macbook Pro is still hotter
nictimus indeed
LOL!!!!! Rightly said....
I’ve heard this a lot and I gotta say, I’m using my Macbook Pro for Music production which has destroyed two of my Windows laptops, but my Macbook barely gets hot, so I gotta ask: WTF do you guys do with your MacBooks??!!
Rickster Music, I meant the new Macbook Pro, the i9 version, that thermal throttles.
nictimus Oh.. i feel stupid now. haha
Persian: "Our heatshield will blot out the Sun!"
Spartan: "Then we shall take measurements in the shade!"
That oven example is amazing
They should send an old Toyota up with some Mexican beers. Then they can see a Corona from a Corona while drinking Corona.
jimmyfly look up the car toyota corona and its real
András Ács you do know that a toyota corona is an actual car right?
Who's gonna investigate that death?
Sorry
Dean Churchman it's gonna b a corona inception!!! :-)
Matej Milovanovic
Cry some more about it, maybe that'll help?
It only operates at night. Duh
Woosh
Konnies Egg there is not day cycle in space, only night because night is literally space.
Jeff da gamer Mintah just replied to yourself there bud. Nice
Konnies Egg oh, it's sarcasm, my bad
Jeff da gamer Mintah no but in winter the sun is much colder so
Thank you for answering my thoughts!
They're going to go at night when it's cooler!
Congrats you made it!
The shot with the probe with the full-screen sun in the background is wrong; they're overstating the closeness for publicity purposes. The probe will get to about 9 solar diameters away, so the Sun will be as large as a softball at arm's length. This is extremely close in terms of heat, but it won't look as big as the shot implies.
Not 9 solar diameters away, but about 4.4 solar diameters away. 6.2 million km divided by sun's diameter of 1.4 million km.
From the probe, the sun's angular size would be around 12 degrees. So that's still a good chunk of your field of view, but not nearly as much as shown in the animation.
Daniel Griscom sounds cool, I would be even cooler if it was real
Amazing vid ,cheers n all the best
Let’s attach the Paul brothers on it
Broose Waiyn yay
Yessss!
Very Interesting. would be that the small fold mirrors "Peeking" out from the edges of the sunshield are also "cold mirrors" The type that allow the heat to pass through into space, while reflecting some visible light to the protected sensors?
This is similar to the old Hollywood trick of hiding the expensive camera behind a rock or other blast shield, while photographing an explosion scene through a 45 degree mirror that might get destroyed during the explosion, but will save the camera.
Excellent! So it won’t be using the Ferengi invented forcefield?
In a far, far Galaxy, they're using it. but no here sadly.
I have decided to finally sell my bridge. It is in London. I am taking offers. My initial market research indicates that people who believed this video are my most likely customers. Incidentally, my research also showed that these same people should not have offspring.
JAKE W JONES it will be fine
JAKE W JONES
You should look for flat Earth videos. Those public is what you are looking for.
JAKE W JONES I’m not sure what you mean. I mean, the mission IS happening; you can look it up on NASA’s schedule.
Excellent video, thanks for uploading.
Excellent video, thanks for posting, much appreciated : )
Hi i am from future... congrats you made it to sun
I can't wait to see the James Webb Telescope to be deployed
It will either be "deployed" or "destroyed".
The testers cannot deploy it on the Earth. So the developers do some changes to the heat shield of JWST.
Well you’ll be waiting a few more years, it was delayed until 2021.
Just send the damn thing into the sun already
949surferdude Actually humans don't have rockets powerful enough to send something significant under the Sun surface. Probably Falcon Heavy can send 10kg to the Sun.
Amazing as usual, congratulations ☀️🕶
This is simply amazing!
What about the solar bursts that happen at the corona?
Can it survive one of that?
well, we shall see.
Chaitanya Singh I thought the same thing but I dont think they're gonna say "gosh darn we forgot about the solar flares oh well" after they send the probe.
I dont think it would orbit that close
It would be a shame if right after they get the probe to it's orbit a coronal mass ejection just broke it.
Edwin Tse ikr, but in the video it looked like it was right on the surface. xD
U dont need a huge heat sink when approaching the sun. Size matters, and the smallest you can get wins in this case.
Mass accumulates heat, as a very small satellite, the particles from the sun will barely hit it, and the ones that do are almost instantly cooled down by the shield and cooling system.
PS: heat in space, is a LOT` weaker than heat on earth, due to vacuum, lack of an atmosphere and lack of gravity.
At 01:45
Learned it in thermal expansion last year and even in thermodynamics this year😍😎
So inspiring... Keep the good job
Without watching the video im going with massive sunglasses smeared in factor 50 sun cream to protect it amma right???
dazhibernian yes
Hahahahahahaha 😂😂🤣🤣👊🏽
Hmm, I give 2 weeks maximum till Nasa hires you
Hahahahaha
What's an Amma right?
Brian Use your imagination, - 'am i right'.
reminds me of the movie Sunshine (2007)...
MK Uis hey...me too.
Same !
I scrolled way too far to find this
@chatoiement It's not exactly a well known movie, but come on it's not that unknown. Love the soundtrack on that one.
Awesome!!!!!!!!! Space exploration has and always will be the future. Seeing stuff like this makes my day
nice work
Just put the AC at max
Surely the "water" is mixed with something a bit more high performance? I'm intrigued!
Thanks. :)
"The coolant used for the system? About a gallon (3.7 liters) of deionized water. While plenty of chemical coolants exist, the range of temperatures the spacecraft will be exposed to varies between 50 F (10 C) and 257 F (125 C). Very few liquids can handle those ranges like water. To keep the water from boiling at the higher end of the temperatures, it will be pressurized so the boiling point is over 257 F (125 C)."
phys.org/news/2018-07-sun-wont-parker-solar-probe.html
Water has a very high specific heat capacity, making it one of the best fluids for heat dissipation.
No need to mix it with anything!
Absolutely. -The Freezing and boiling point of water was my main concern.
However, I read that they're using 5 liters of deionized water, BUT, they are pressurizing the system to raise the water's boiling temp to 257F. Freezing doesn't seem to be an issue since the Sun will preheat the system into operation. ;)
Of course! Just a few bottles of Vodka and it’s good to go!
how does the heat transfered from the cooling system to the environment? Even an *air* is not good enough, let alone a void.
I need to buy that radiator for my pc.
I like where this channel is going
Nice drone, Goddard!
Power of SunGlass :)
Great video, fascinating stuff! But about that music....
jeeshadow yeah.. just spoiled the entire video.
How would circulating the water/coolant through radiators help?. Radiators will be at similar temperatures as the shield
That oven analogy is cool..!
I wonder if there is any concern for CMEs ... I imagine they could increase the local energy density of the corona quite a bit ... Is there good data on the energy density of a typical CME that close to the sun and how close to the maximum that the Parker Solar Probe can withstand are they?
Zach Cox I was wondering about that. Can't wait to see what they discover with the probe.
Currently the probability of a coronal mass ejection is very low, but not zero. We are currently experiencing the solar minimum, part of the Sun’s 11 year “season” of activity. This means this is the best time for a mission like this as the Sun us very “quiet.” Very few sunspots, magnetic storms and flares.
When I posted the comment above I did think about 'Solar-Minimum' and if we combine this with the expected lifetime of such probes then that would argue that it is OK not to worry too much about CMEs. So: "Slide In While Things Are Quiet And Take A Look" :)
The information is good but the presentation with the voice over and hokey music makes it difficult to take seriously for the casual viewer
would u rather they record the millionaire nasa ceo’s laughing at idea’s that the taxpayers believe.
What is there to be serious about? Science exploration is all about cool ideas (in this case hot idea). Be casual, lay back and enjoy!
It is actually designed to be viewed by the casual viewer, hence the cartoony sounds. For more serious discussions, there are other channels. Check out 60 symbols and it's associated channels by Brady! :)
Op is a serious sciencer and nasa needs to make all their vids catered to them while everyone else is casul who don’t even kno 2+2.
GtfOOOOOOOOOOOO.
Yeah the music is a huge turndown
Muy buen vídeo. Thanks!
We already there right now! Amazing!!
FARENHEIT?? FAREENENHEIGHT???
Silly Europeans, still rejecting God's systems of measurement. How sad!
King of the Moon In Science no one and I mean no one uses Fahrenheit... But this is Public information made to be understood by the American Taxpayer... Since most US Citizen have no clue what Celsius means NASA is forced to simplify things... Science communication is different, it explains Science in layman's terms.
King of the Moon There is no God by the way.
jimmyfly You think that's the issue here? I'm American and in science in general it's celcius or Kelvin. Fahrenheit maybe for Earth weather but come on, let's be real, a European will have less problems with both units thrn the undereducated American society lol
Raydensheraj ok you're cool, you can convert simple units... genuis here everyone!
The Sun goes away at night , just go then
NASA amazes me everytime..!
"So if you wake up one morning and it's a particularly beautiful day, you'll know we made it."
I have seen it in person. It is majestic, gigantic, and has really cool panels. Navigation is neat too.
Palatisan
No you haven’t 😂🤣😂🤣
A Town Actually, I have. What makes you think that I didn’t.
Palatisan
Because it doesn’t exist 😂😂😂
A Town I took a selfie with it tho
Palatisan
I’m sure you did 😂🤣😂🤦🏻♂️
I'm kind of interested in what would happen to the water in that closed loop cooling system. Water boils at 212 degrees but space is in a vacuum, which would make water boil instantly. So is it boiling in those lines or is it pressurized somehow?
They are really making it look easy as if going to a shopping store to get some grocery items, man humans are definitely progressing and also are fearless to explore things :)
0:46 Thank you very much!
Flat earth people be like this is fake
Please be r/whoooosh
Flat earth people won't complain dude... They can see the sun is circular. They lack skepticism, not eye. If they have skepticism, they'll say sun is spherical.
... Because CGI won't melt.
Excellent oven analogy
Makes sense to me. In less dense atmosphere it wont melt. Hopefully it will work.
Easy, let's just visit the Sun at night and winter when it's turned off
Red Vanderbilt lol u got joke
and do not forget to take with you some flex tape
Red Vanderbilt yeah as simple as that
Red Vanderbilt And don't forget to bring your jacket
*BRILLIANT*
It has big shield in front of it than how it can research behind from it
Parker Solar Probe will carry four instrument suites designed to study magnetic fields, plasma and energetic particles, and image the solar wind. Imaging the sun is already done by other spacecraft. You can learn more here: www.nasa.gov/content/goddard/parker-solar-probe-humanity-s-first-visit-to-a-star
More on the instruments: www.nasa.gov/content/goddard/parker-solar-probe-instruments
It doesn't really affect the results
It's just a math
Nice video
That's very cool ;)
Can't Wait to walk on Sun
You're welcome to go first.
Blue Milk Can't wait
“You can go in the solar winter when the sun is cooler” Ali G
Gaming With BlendzZ. Get ready to meLt :)
Sun-Kissed 😬
alright stupid questions
1) Why not cover the whole probe in the heat shield?
2) when it gets close enough to the sun wouldn't Light be hitting all sides of the probe and thus throw the sensors off (blinding it)
3) what is keeping the radiators cool? Might the water behind the solar cells heat up faster than it has time to cool and become ineffective?
4) IF the water in the system was to get too hot and become steam, can the cooling system take the extra pressure or is it going to blow itself up?
5) as a counter measure wouldn't it be wise to make sure the electronics are water proofed?
and that's all the stupid questions I could think of atm.
Edit:
6) Did they make sure that all the components used in the probe don't have a low melting point.
Kittsuera
There is idea they should test this device in some solar energy station with mirrors collecting the Sun light in one spot. The should place it into the spot with expected light energy flow. Then do testing for at least one day (several peak hours).
Here's the answers I could come up with, correct me if I'm wrong:
1) The whole probe isn't covered completely is because the only spot that would get heated up is the spot that faces the sun directly, so it'd be unnecessary to cover the entirety of the probe in the heat shield. All you'd have to do is make a circular heat-shield that covers the probe from direct view of the sun, and make sure it's always pointed at the sun to prevent damage.
2) No, because there's no atmosphere and ground like on earth that causes the photons to reflect and go in many directions. If you're not in the line of sight of the sun, you won't have any light and heat hitting you.
3) The radiators radiate the heat off into space in the form of infrared radiation. The required water flow to cool the solar cells and the amount of heat radiated has likely been accounted for by NASA, so they've designed the probe's cooling system based off of calculations and tests.
4) I believe they accounted for this by increasing the pressure of the water in the system, which allows the water to have a higher boiling point temperature and thus reducing the risk of explosion.
5) The electronics are already hardened to withstand radiation and other thing in space, making them water proof wouldn't really make sense. If the water system failed and exploded, there would be no water to cool the electronics and space craft, so it would be destroyed regardless if they were water proof.
6) The electronic components chosen for the mission and the solder joints between them likely have high temperature tolerances, and are likely to be very reliable for space flight applications.
I hope this helped answer your questions!
Kittsuera
1) money and weight. Heatshields are expensive and heavy.
2) the light from the sun flies out from the surface and away from it, meaning there would be nothing to reflect off of and onto the spacecraft.
3) the water is kept under pressure so that the boiling point raises above the ambient heat of the surrounding area. Water is a very versatile cooling system.
4) I dont work with NASA so i dont know, as i said earlier, water is pretty great so i dont think they would do such a thing out of sheer will. But who knows?
5) the spacecraft is flying towards the sun through space. If it can withstand a vacuum, it can take water.
6) NASA knows what theyre doing, last thing I expect is for them to underestimate the heat of a giant ball of plasma 1000 times more massive than our entire world.
I still for see a slight problem with my # 2 point.
the Sun is about 109 Earths wide. will light really be radiating in one direction perfectly Vertical from every point on the sun?
What is stopping the far ends of the sun from radiating light diagonally?
Well for arguments sake we assume that the sun is large enough, and that the probe is close enough, for you just to think of it as a big flat plane emitting light. This is the worst case scenario as its actually curved and some light will be shining diagonally above and below the spacecraft. If we go back the plane, the light it emits is radiated out from the plane, perpendicular to it. Then some of it is blocked by the heat shield leaving whatever is behind it in shadow. This shadow does converge at and angle yes, but it's certainly been calculated by NASA for operating distance of the probe. Hence why the main bit of the probe is a lot skinnier than the heat shield. Just look at planets for an example, one half is bright, one half is dark and in shadow. And because there is no atmosphere to scatter the light the shadow is pure shadow and actually extremely cold.
You ask what there is to stop the sides of the sun radiating light sideways/diagonally towards the spacecraft? For one theres physics, most of the light/radiation is shot off perpendicular to the surface. The reason we get such effects here in earth is because of the atmosphere scattering light. In the case of the sun its just flung outwards with the solar wind. And it some were to be scattered towards the probe in some way it would likely be too weak to effect it much. Also the probe could be orbiting too close for that to be a factor. The closer it is, the less the bits of the sun not directly in-front of it, can effect it. As is you drew a line, from its point of origin on the surface, it would have to go through more of the sun itself again. Just take a circle and put a dot representing the probe right next to it, see how many lines you can draw to it from the surface that dont go into the circle itself, its rather limited. And that the worst case scenario for radiation from the sides of the probe.
Hopefully thats cleared some bits up! :D Sorry its a bit long, I think I've rambled.
Amazing!
Awesome 💛
I bet my MI phone can melt that probe
I'm typing this on a MI phone lol.
Can it survive solar flares?
It won't be that close to the sun. I will be about 4.4 times the diameter of the sun away from its surface.
We are currently in the heart of the solar minimum. There are very few flares occurring right now.
Highly doubtful!
A probe doesn't have an atmosphere like earth.
Earth is situated at a perfect distance from the sun with a magnetic field which disperses the solar flairs.
Also acting as a faraday cage to stop global electro magnetic pulses (blackouts).
@@rhondatype6556 love mama earth🥰😍🤩😘🌍🌎🌏
Amazing era we live in.
24/7 shine 365 days a year, full coverage
Oh dont forget to apply sunscreen and wear glasses when you visit the sun😊
Mission impossible
hold my bear
Dieng Khadim Mbacke yes
Parker probe:hold my sun
That some great music choice XD
Wonderful 👌👌👌
I know, I know. They are sending the probe at night.
Now the real question is, how do they know the density of the Corona if this is the first probe to go there 🤔🤔
There's been other spacecraft.
Short version, they use radiation profiles during a solar eclipse (which blocks basically everything but the corona).
Long answer, here at Cornell Archives arxiv.org/ftp/arxiv/papers/1112/1112.3850.pdf
Ever heard of mathematics and laws of physics?
cleisz torrefranca, flying close to sun is not like apple falling down from tree, ever heard about perturbation ?
iani_3d so, you're thinking that laws of physics combines with mathematics is just about the analogy of apple falling down the tree. Do you even know how wide physics is?
Wow. All the best NASA. Thanks for sharing knowledge with the world.
Thank you NASA Family that is beautiful, peace and love, Doug:)
I build Houses for 20 years. They use in modern times 25 cm diameter insolstion to manage temperatures in -20° to 30° .....
Thats Why i like NASA space Programm..... in a couple of years, i Imagine a House Insolation with maybe 2 mm Material!
Well, that won't happen. You can imagine everything if you want, but keep your insulation dealer at hand, because that probe will:
1, get closer and closer to the Sun
2, and melt into a red, then white ball
3, then evaporate fairly quick.
Lyvlon
Well, why don't you ask them about it?
Baladár I don't know, guess you don't speak to yourself in the mirror often?
Wow & we cannot solve world hunger
We can, we are doing it. Major improvements in global food security over the course of the next decade should see hunger levels drop sharply in developing countries, as people are better able to obtain and afford food, the US Department of Agriculture (USDA) has predicted.
According to new projections, dropping food prices and rising income levels will improve food security in 76 low- and middle-income countries. Right now, 17 percent of the population in developing countries overall don't have adequate access to food, but by 2026, that number should drop to just 6 percent, says the USDA.
That's a pretty staggering decline, reflecting a fall of 59 percent in the overall amount of people who don't have enough to eat. That means we're looking at world hunger dropping from some 609 million people in 2016 to a projected 251 million by the end of the decade.
exited to see which rocket will carry this thing
2.000.000°F - 3.000.000°F = 1.111.000°C - 1.666.650°C
But from my knowledge about Sun's Corona is that the temperature can reach about 10.000.000°C (17.000.000°F) and that's much higher than stated in the video...
What about solar wind?
Even near the sun, the solar wind pressure is extremely low.
My3dviews Um I don't think so! According to the equation of the solar wind pressure, the proton mass, the density in the solar particles and the speed of the wind, they all get higher when the pressure gets higher. When you're close to the corona, you experience the "fast" solar wind, which has a velocity of 750 km/s, while near earth, it's average of 400 km/s. So the pressure of the wind near the sun is much higher.
+Celtic 67 The pressure of the sun's corona is a fraction of the Earth's atmospheric pressure, since it is made of low density particles (like protons and electrons and some alpha particles), not heavier ones like Earth's atmosphere.
The solar wind is made of these low density particles that escape the upper corona. They escape because they are far enough away from the sun where gravity is lower.
scied.ucar.edu/solar-corona
+Rogy Mahmoud You need to take into account the extremely low density of the corona when making calculations of its pressure. Single fast moving particles like protons and electrons do not produce much pressure even at high speeds.
Celtic 67 lol bc science man. Its whatever they want it to be
Why would you down vote this ..it’s amazing
I suspect it's the crazies, flat Earthers and theists, oh and EU'rs. The ones that believe science is a hoax. It's quite funny they're right and NASA's wrong.
EU'ers dont believe science is a hoax, they can only do rudimentary electrical engineering, and even then they suck at it
Glenn Reid
By “science” you mean pseudoscience right? Because that’s what NASA is greatest at
Yeah there's a lot of flat earthers in here. I suspect they're the same ones cheering SPACE FORCE because reasons I guess?
kevin cahill yeah. If you peruse the comments section now, it’s a cess pool. The keyboard scientists are coming out in force. We simply do not have enough people with common sense to man the battle stations. I suspect this comments section will be a total loss within a weeks time.
This is so cool! Am i the only one thinking of the movie Sunshine?
What happen when sudden changes in the temperature which is unmeasured before?? Is there any backup for preventing solar probe from those kind of situations??
Lemme guess, the probe are made from the flextape
The sun is white tho not yellow
It's both. The sun emits a continuous spectrum that peaks around yellow. And by measuring where this peak happens, we can even predict its surface temperature.
en.wikipedia.org/wiki/Black-body_radiation
Oh
Hi dear
It is white but, society, culture and, tradition has mostly viewed it yellow since that’s the wavelength we see from earth during the day. That’s why most CGI or cinematics, regardless of accuracy, like to make the sun yellow instead of white.
Diego Llamas :Yep. Apperently it appears yellow because some of the wavelength is abosorbed by the blue sky. If you add the blue back into the yellow sun, it looks greener. Although due to its intensity, our eyes will see it as white.
Evidence of a green sun exist in plant leafs. They are green to maximize the amount of radiation absorbed for photosynthesis.
Diego Llamas thank you and CitedHarbor0 for that wavelength and leaf fact!
Is it going to do a very close circular orbit, or is it going to do a very elliptical orbit where it does the measurements in the perihelion and then take time to cool down at apohelion?
Bravo. Ce genre d'expérience fait avancer la science et donne du sens a la technologie spatiale.
This kind of experiment is usefull to improve the way we understand the world we're living in.
Sun is a small star in a corner of the milky way : we can keep humble in front of universe.