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Apr
21
comment What's the difference between grism and grating?
They disperse light with different dispersion functions, allowing astronomers to see different spectral features.
Apr
17
comment If we built one hundred 3m telescopes and point them to a single star what would be the final resolution?
Wikipedia has some good articles that talk about the issues (such as en.wikipedia.org/wiki/Astronomical_interferometer ). I think the main things are the incredible precision required and how the number of mirrors involved cause significant attenuation of the signal, severely limiting which objects that can be imaged in this way.
Apr
17
comment If we built one hundred 3m telescopes and point them to a single star what would be the final resolution?
@user6760 That's the key to the answer, just write it up with some explanation and post it as an answer. Don't forget to explain how the "aperture" is determined for interferometry telescopes and the difficulties in using optical interferometry.
Apr
8
reviewed Leave Open How do we know the universe's expansion is speeding up?
Mar
28
comment Can our Sun become a black hole
A large part of this answer has nothing to do with the question, could you please clean it up and add relevant detail.
Mar
26
revised Do we still use the term “astronomical unit” nowadays?
basic spelling/grammar/punctuation cleanup
Mar
26
awarded  Cleanup
Mar
26
awarded  Good Answer
Mar
26
reviewed Leave Open BIG Problem with the Planet definition
Mar
26
reviewed Leave Open Does the Sun turn around a big star?
Mar
17
comment Is there a connection between black holes and dark matter/energy?
Really? The other answer seems to have done a reasonably good job.
Mar
17
comment Is there a connection between black holes and dark matter/energy?
Not to be a pain, but this answer is pretty useless as it contains no explanation or justification.
Mar
13
comment Does “Dark Matter” really exist?
To start with, you've confused dark matter (which would bring the universe together) with dark energy (which is theorized to be the reason for continued expansion).
Mar
13
reviewed Approve How to calculate the expected surface temperature of a planet
Mar
11
answered Why are Hubble images “Cut”
Mar
9
reviewed Close How was Henrietta Leavitt's discovery important for star measurement?
Mar
9
reviewed Close Why there are other planets in our solar system?
Mar
9
reviewed Close How can we see the Milky Way Galaxy when we are already in it?
Feb
23
reviewed No Action Needed Is Blue Shift just as provable as Red Shift?
Feb
23
reviewed Close Why would a star’s position in the sky change relative to another star right next to it?