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Has any astronomers discover a star system on the other side of our galaxy? Two-part question.

Napoleon said:
No. It has three or four hypothetical planets but nothing confirmed.

Correction: it has two confirmed (neither as habitable) and three or four hypothetical. Tau Ceti e is certainly not habitable. And we don’t know what kind of planet Tau Ceti f is but even if it is a rocky world it hasn’t been in the habitable zone long enough for life to develop.
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No, we can't make assumptions as to whether or not Ceti f has had enough time to have developed life. It is very possible that life could exist over there and we would not know it.
 
slavablueberryjam said:
No, we can't make assumptions as to whether or not Ceti f has had enough time to have developed life. It is very possible that life could exist over there and we would not know it.
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We can because it hasn’t been in the habitable zone long enough for that to be possible. Even with the very generous assumption that it isn’t a mini-Neptune.
 
Napoleon said:
We can because it hasn’t been in the habitable zone long enough for that to be possible. Even with the very generous assumption that it isn’t a mini-Neptune.
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We can't make those assumptions due to only understanding of how life forms is from this planet. For all you know, there could be aliens more intelligent than us on that planet.
 
slavablueberryjam said:
We can't make those assumptions due to only understanding of how life forms is from this planet. For all you know, there could be aliens more intelligent than us on that planet.
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It’s a good assumption considering that what is habitable is determined by life on this planet. You have to start somewhere.
 
Astronomers have discovered more than 3,20 other stars with planets orbiting them within our galaxy.

And astronomers have found evidence for a possible planet candidate in the M51 ("Whirlpool") galaxy, potentially representing what would be the first planet seen to transit a star outside of the Milky Way.

The topology of the event horizon of a black hole at equilibrium is always spherical. For non-rotating (static) black holes the geometry of the event horizon is precisely spherical, while for rotating black holes the event horizon is oblate (flattened or depressed at the poles).
 
Napoleon said:
It’s a good assumption considering that what is habitable is determined by life on this planet. You have to start somewhere.
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We can't even start here because we don't know for sure when life started nor how. They give a very rough estimate that life started 600million years after forming, but that could be wrong.
 
slavablueberryjam said:
That was the first question above. The second one is is the supermassive black hole flat, so we can see beyond it?
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The event horizon of a black hole is spherical, but small relative to seeing around it, that view is obstructed by clouds and stars as mentioned above.
 
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