Direct Imaging of Exoplanets - Bruce Macintosh (SETI Talks)
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- Learn about an exciting new exoplanet discovery-a Jupiter-like planet called “51 Eri b” that orbits a star a 100 light years away in the constellation of Eridanus.
Using a powerful new imaging device, astronomers have spied a Jupiter-like exoplanet 100 light-years distant in the constellation of Eridanus. Unlike most planets found around other stars, 51 Eri b has been seen directly. The instrument employed to make the discovery has also made a spectroscopic analysis of the light reflected from the planet, and has detected gases similar to those in Jupiter’s atmosphere.
Because GPI not only images exoplanets but also spreads their light for chemical analysis, astronomers can search for such common gases as water and methane in their atmospheres. Researchers had expected to see methane in directly-imaged exoplanets based on the temperature and chemistry of these worlds, but had failed to detect these molecules in large quantities using earlier instruments. However, the observations of 51 Eri b made with GPI have clearly revealed a methane-dominated atmosphere similar to that of Jupiter.
An extraordinarily complex instrument the size of a small car, GPI is attached to one of the world’s biggest telescopes - the 8-meter Gemini South instrument in Chile. It began its survey of stars last year.
The host star, 51 Eri, is very young, a mere 20 million years old, and is slightly hotter than the Sun. The exoplanet 51 Eri b, whose mass is estimated to be roughly twice that of Jupiter, appears to orbit its host star at a distance 13 times greater than the Earth-Sun distance. If placed in our own solar system, 51 Eri b’s orbit would lie between those of Saturn and Neptune.
38:20 skip here to avoid basic astronomy
+Teemu M. Thanks. Only i dint see this untill i already watched the full video ^.^ (almost fell asleep in the beginning. And after this point it is verry interesting indeed!!
+Teemu M. Thanks for the heads up
Wöt is basic astronomy?
I actually like to hear it over and over and over..... and once in a while i catch something either a little new or explained in more depth.
i thought this was one of the best of the seti talks, really good.
Awesome lecture. Excited to hear more about GPI accomplishments.
This is Great! Thanks for the Post!
Great talk.. Thanks once again SETI
Well done! Understandable even to me, outside the field.
hello frends
☆☆☆☆☆
Praise Keck
Naah. You were lucky to find him actually. Cameron is usually someplace else ....but it's his day off.
Ba dum dum PSSSH 🥁
Thank you for the talk. Stop touching hair, nose ears, etc carry tissues! Something mom should told you!!!!!
Didn't yours ever tell you that if you don't have anything nice to say, then you should probably not say anything at all?!
How about, "keep your criticism constructive!"?!
Either way, you've earned yourself a big, fat 🖕!
So, congratulations douchebag!
This guy's got a strange way of speaking - would be great were it not for that habit he has of BARking some words at volume. Most disconcerting
Ah well,
You can't make EVERYONE happy I guess.
douchebag 🖕
So this is where Cameron from Ferris Beuller ended up?
Ba dum dum PSSSH 🥁
they fail to realize that IF a planet is 100 light years away, we're seeing how the planet was 100 years ago. if it blew up, it'd take 100 years for us to even know about it.
I dont think one single scientist working in this field would fail to realize that, or realize that the further away a planet the older the light, the further back in time you see. Thats 101 basics.
Also another very important and basic point they take in is part of the Drake equation (which in inteself is basic) is the life time of a civilisation, which is assumed to be a very modest 10,000 years by some people. But its a complete unknown.
Theres been quite a few programs made on the Drake Equation, and Fermi's Paradox. Any of the documentaries ive seen on the subject have been great. Check them out. Hopefully you'll like one :)
planets last billions of years. a 100 years is nothing.