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postato inizialmente in: Ask me anything about Astronomy
Modificato da The Cellar Door: 4/23/2016 8:09:13 PM
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Yes, none that we have detected because Andromeda is so far away, but with the amount of Earth-like planets in the Milky Way being found all the time, it's hard to say that there wouldn't be any in Andromeda. The issue is, planets closer to us are easier to detect because we don't have good detection methods, but because of the limits of our detection methods, we sometimes are able to discern if a planet is like Earth if we can see it's atmosphere and figure out it's distance from it's star. To see a planet all the way in Andromeda, we have to rely on gravitational lensing, which relies in the planet being big enough, in the elliptical plane that we would see the planet in front of the star, and our ability to discern this gravitational lensing from other possible sources. To figure out the atmosphere of that planet would be incredibly difficult to do.
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