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seen Oct 13 at 16:35

Oct
10
awarded  Nice Question
Oct
6
reviewed Approve suggested edit on What scientific evidence is there to support or refute the Iron Sun Hypothesis?
Oct
3
awarded  Custodian
Oct
3
reviewed Reject suggested edit on Does the Sun belong to a constellation?
Sep
30
awarded  Explainer
Sep
26
awarded  Yearling
Aug
24
comment With gravitational lensing, is it possible to mathematically compute the correct image of the galaxy that is being distorted?
Agreed with 1), but not yet with 2). Consider a continuous background image like CMB. How would that be not a problem?
Aug
22
comment With gravitational lensing, is it possible to mathematically compute the correct image of the galaxy that is being distorted?
1) You might not know the lens mass distribution (would it all still be possible?), 2) Even on the famous Hubble photo you see that one same object may give two images.
Aug
19
comment With gravitational lensing, is it possible to mathematically compute the correct image of the galaxy that is being distorted?
"That would be possible theoretically." - can you prove it/give a reference? Or in other words, given a well resolved image of gravitationally lensed object, how would one go about reconstructing the original?
Aug
4
accepted Generalised planets?
Aug
4
comment Generalised planets?
Greatly many thanks for a very good and interesting reply!
Jul
2
awarded  Curious
Jun
16
answered How would the night sky look from inside a globular cluster?
Jun
15
comment How are black holes found?
You should definitely check the time it would take for a three solar mass black hole to evaporate.
Mar
19
comment Why is the interstellar medium so hot?
@chris: Cosmological expansion should affect the temperatures of IGM similarly as it affects the CMB temperature, that's why I am mentioning it. But then IGM would be too cold comparing to 10^4 K. It indeed seems plausible that it was reheated when it was reionized. Thanks again for your comments!
Mar
18
comment Why is the interstellar medium so hot?
@chris, very useful point, thank you again! Do you know if the primordial IGM cooling is mainly due to cosmological expansion or radiative cooling?
Mar
17
comment On analogies between gas and stellar systems
Indeed interesting, @chris, thank you!
Mar
1
comment Do telescopes harm while observing sun through them?
@Gerald, very illustrative, thank you!
Feb
28
comment Do telescopes harm while observing sun through them?
So, what exactly will happen if you point, say, VLT at the Sun?
Feb
23
comment If we lived in a multiverse, what would our universe most likely then be named?
@Rhys, very reasonable and good question. If questions whether pluto is a planet and alike are discussed at IAU meetings, why would it be unreasonable to speculate on the possible names for our part of the multiverse?