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+--- Thread: Exoplanets photographed (/thread-5881.html)
Exoplanets photographed - F2d5thCav - 07-24-2020
https://www.syfy.com/syfywire/two-giant-planets-directly-imaged-around-a-young-sun-like-star
Pretty neat.
Cheers
RE: Exoplanets photographed - Bally002 - 07-24-2020
(07-24-2020, 02:57 PM)F2d5thCav Wrote: https://www.syfy.com/syfywire/two-giant-planets-directly-imaged-around-a-young-sun-like-star
Pretty neat.
Cheers
Yes, it is neat. Great pics for that distance. Nice very early morning read for me.
Kind regards,
Bally:)
RE: Exoplanets photographed - Schmoe1 - 07-24-2020
Exciting times we live in. I have strong faith they'll find a life-suitable planet in my lifetime, though there are MANY more factors at play than simply being in a star's goldilocks zone.
But as we all know, in the vastness of the universe, there are likely to be many worlds similar to ours.
Getting there is an issue obviously. I love when I see articles saying ONLY 11 light years away, like they don't know it's not really 11 years, but the distance light travels in a year times 11. That's a mind boggling distance.
RE: Exoplanets photographed - F2d5thCav - 07-24-2020
Yeah, given the distance of the system in the article, that is the way those planets looked in our year 1710 . . . that is a LONG way.
Cheers
RE: Exoplanets photographed - argentus - 07-24-2020
(07-24-2020, 05:24 PM)F2d5thCav Wrote: Yeah, given the distance of the system in the article, that is the way those planets looked in our year 1710 . . . that is a LONG way.
Cheers
Yes, and this star is apparently thought to be a very young one, according to the article. 17 million years old! pffffft! A toddler sun. Merely 310 LY away. Practically next door!
RE: Exoplanets photographed - TheDoctor46 - 07-24-2020
Great stuff. Always makes me laugh its young. Only 17 million years!
RE: Exoplanets photographed - guohua - 07-24-2020
(07-24-2020, 05:31 PM)argentus Wrote:(07-24-2020, 05:24 PM)F2d5thCav Wrote: Yeah, given the distance of the system in the article, that is the way those planets looked in our year 1710 . . . that is a LONG way.
Cheers
Yes, and this star is apparently thought to be a very young one, according to the article. 17 million years old! pffffft! A toddler sun. Merely 310 LY away. Practically next door!
So young, just think of an Earth Like planet near that Star, where would it be in its evolution?
Volcanic activity or life?
RE: Exoplanets photographed - Ninurta - 07-24-2020
(07-24-2020, 10:07 PM)guohua Wrote:(07-24-2020, 05:31 PM)argentus Wrote:(07-24-2020, 05:24 PM)F2d5thCav Wrote: Yeah, given the distance of the system in the article, that is the way those planets looked in our year 1710 . . . that is a LONG way.
Cheers
Yes, and this star is apparently thought to be a very young one, according to the article. 17 million years old! pffffft! A toddler sun. Merely 310 LY away. Practically next door!
So young, just think of an Earth Like planet near that Star, where would it be in its evolution?
Volcanic activity or life?
Probably still cooling down from the molten globule stage, and way too hot for any organisms to survive. Earth is supposed to be 4.5 billion years old, but the oldest evidence of life is between 3.9 and 3.7 billion years old, meaning that Earth had to cool for around 700 million years at the lower limit before life could start to form.
So, depending on it's size and bulk, an exoplanet will takke a little less time or a little more, but if it is Earth sized, we can anticipate at least a 700 million year cooling off period.
.
RE: Exoplanets photographed - Ninurta - 07-24-2020
These planets are huge gas giants. One is 14 times more massive than Jupiter, the other 7 or 8 times more massive. That places them in the range to become Brown Dwarf candidates.
Pluto is roughly 40 AU from the sun. Planet b here is 162 AU out, making it 4 times farther out from the star than Pluto is from the sun, and planet c is 320, putting it EIGHT times farther away. We know how cold space is around Pluto, and it will be considerably colder for these planets due to their distance from the star. The glow we see in the images is their own heat, generated internally by gravity compacting their gasses due to their great mass.
If they are or become brown dwaves, they may have a retinue of "moons" or "planets" of their own, considering their distance from the central star, for which THEY provide the heat and light. Any potential life-bearing planets in that configuration, however, would need to be pretty close to the brown dwarf, as they don't even generate the energy of a red dwarf star.
"Brown dwarves" are kind of a gray area - they are not massive enough to ignite into actual stars, but are too massive to be mere planets.
.