Exoplanets: Crash Course Astronomy #27
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Date: 2022-04-04
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Comments and reviews: 10
Gilbert
I see mention of -transit- and it seems to make sense, but I do have a couple of concerns--these objects are so far away I don't feel we should be to quick to asume the exoplanets as being certain--so I do like the fact that they are trying to use different methods of detection--with advanements in digital photography, for example--and the photos of a planet where it apears on different sides of it's star several years apart really does seem real. One question I have is about -transit---in systems with a few or more object with a high albedo, a star may also look dimmer when a planet is on the far side of the star, blocked by rhe star--whereas at times other than transit or occultation (I believe the term is) we can probably see some light shining off of the planet itself, as well as from the star, and so it might be (at least in cases of high albedo -which is a way of saying reflectivity) that the period of a planets orbit is actually about twice what we have been asuming. In order to test this idea I wonder if we might be able to examin images of Mercury or Mars to see if any of the light we see from them might have been reflected off of Jupiter, Saturn, Uranus or Neptune. I realize this might be difficult, but they are much closer than the exoplanets. I would also like to see images of these stars thought to have exoplanets taken from a source as far from the plane of the ecliptic as we can get--say by launching a telescope towards Polaris.
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I see mention of -transit- and it seems to make sense, but I do have a couple of concerns--these objects are so far away I don't feel we should be to quick to asume the exoplanets as being certain--so I do like the fact that they are trying to use different methods of detection--with advanements in digital photography, for example--and the photos of a planet where it apears on different sides of it's star several years apart really does seem real. One question I have is about -transit---in systems with a few or more object with a high albedo, a star may also look dimmer when a planet is on the far side of the star, blocked by rhe star--whereas at times other than transit or occultation (I believe the term is) we can probably see some light shining off of the planet itself, as well as from the star, and so it might be (at least in cases of high albedo -which is a way of saying reflectivity) that the period of a planets orbit is actually about twice what we have been asuming. In order to test this idea I wonder if we might be able to examin images of Mercury or Mars to see if any of the light we see from them might have been reflected off of Jupiter, Saturn, Uranus or Neptune. I realize this might be difficult, but they are much closer than the exoplanets. I would also like to see images of these stars thought to have exoplanets taken from a source as far from the plane of the ecliptic as we can get--say by launching a telescope towards Polaris.
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Politically
I can remember arguing with a teacher about this once. It made sense to me that if suns are common, planets must be as well. Just because we can't see them doesn't mean it doesn't make endless sense for them to be there. All stars are formed in roughly the same way, so the features of solar systems should be similar as well. Which means that there should be far more planets than stars and far more moons than planets. Because they are smaller and take less matter to form.
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I can remember arguing with a teacher about this once. It made sense to me that if suns are common, planets must be as well. Just because we can't see them doesn't mean it doesn't make endless sense for them to be there. All stars are formed in roughly the same way, so the features of solar systems should be similar as well. Which means that there should be far more planets than stars and far more moons than planets. Because they are smaller and take less matter to form.
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meg
Like he says in the beginning, given just how many stars are in our galaxy alone, it's not really that surprising that planet are a dime a dozen. The odds of finding one that's potentially earth-like though, are a lot smaller, since the conditions are just so specific (see Mars)
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Like he says in the beginning, given just how many stars are in our galaxy alone, it's not really that surprising that planet are a dime a dozen. The odds of finding one that's potentially earth-like though, are a lot smaller, since the conditions are just so specific (see Mars)
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Mick
I sometimes think people find the question - Are We Alone? - reassuring. For me it's obvious. The universe is teaming with life. Do I have proof? No. But the opposite just does 'nt make any sense. If we all could grasp this idea, maybe they would show themselves.
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I sometimes think people find the question - Are We Alone? - reassuring. For me it's obvious. The universe is teaming with life. Do I have proof? No. But the opposite just does 'nt make any sense. If we all could grasp this idea, maybe they would show themselves.
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Ginny
Rea2333 Has traveling towards the Universe Of Earth She lived In An Exoplanet 6854AT from 72 light years away She threatens to kill 6 Million People away And UPSA Is trying to kill this Creature
--Roblox Myths 2019
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Rea2333 Has traveling towards the Universe Of Earth She lived In An Exoplanet 6854AT from 72 light years away She threatens to kill 6 Million People away And UPSA Is trying to kill this Creature
--Roblox Myths 2019
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Basque
So we could not get a proper picture of Pluto from Earth or Hubble, and a probe was sent to do so, but somehow we can get images of exoplanets, hundreds of times farther in deep space?
How is this possible?
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So we could not get a proper picture of Pluto from Earth or Hubble, and a probe was sent to do so, but somehow we can get images of exoplanets, hundreds of times farther in deep space?
How is this possible?
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MrJackOfAllTraits
I just. I just so desperately want to live in a time when we become an interplanetary species. So so so bad. -sigh- but I'm sure that wont happen for 10s of thousands of years maybe more.
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I just. I just so desperately want to live in a time when we become an interplanetary species. So so so bad. -sigh- but I'm sure that wont happen for 10s of thousands of years maybe more.
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Mauricio
I don't get it, how could people be debating if there were planets orbiting the other stars like the ones orbiting our sun if they believed that the Earth was the center of the universe?
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I don't get it, how could people be debating if there were planets orbiting the other stars like the ones orbiting our sun if they believed that the Earth was the center of the universe?
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wareesha
how do scientists see things i mean whenever i go out all i see is a bunch of stars seriously looking sisters and brother i mean so matching to eachotherrr. telescopes oh i forgot
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how do scientists see things i mean whenever i go out all i see is a bunch of stars seriously looking sisters and brother i mean so matching to eachotherrr. telescopes oh i forgot
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education
Hold on 10 billion earth like planets in the galaxy or the universe? He keeps saying galaxy but I feel like hes referring to everything space has to offer because that's insane
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Hold on 10 billion earth like planets in the galaxy or the universe? He keeps saying galaxy but I feel like hes referring to everything space has to offer because that's insane
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