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Apr
13
reviewed Approve Why would astronomers want to eclipse the Sun?
Feb
15
awarded  Yearling
Dec
1
comment What is an “arc” spectrum ?
@ConradTurner, you could add some more details and make an answer out of your comment !
Oct
28
reviewed Approve Why does the Hertzsprung–Russell diagram's x-axis go from large temperatures to lower?
Oct
28
reviewed Approve Is Jupiter just a super earth with hydrogen atmosphere?
Oct
1
reviewed Approve Will Saturn's rings become a moon?
Oct
1
reviewed Approve Why there are other planets in our solar system?
Sep
19
comment Why do stars become red giants?
@RobJeffries, thank you I will edit the answer. Could you say if the $1.1M_{sun}$ limit comes from recent estimations? And yes, I was referring to those types, I will try to clarify that as well.
Jul
13
comment Which kind of properties can we get for cosmic ray particles hitting on an optical ccd?
@RobJeffries, yes, it is true, detectors usually suffer of cosmic rays noise. What I meant is that images are usually cleaned from such events. Instead of "protected" I should have used "veto shielded".
Jul
12
comment What does the BinTableHDU store?
Try to open the fits file (with 'fv') and open the header 1.
Jul
5
comment What uncertainty does an error bar signify in astronomy?
Do you have any example of such a plot? If it is published, the explanation must be in the caption. For the second question, I would open another thread, and try to reformulate, because it is not totally clear and well posed.
Jul
5
comment What uncertainty does an error bar signify in astronomy?
Also, the claim for a 'discovery' really depends on the journal you are publishing: some of them accept the claim at 3\sigma..
Jun
29
reviewed Approve Which is the shape of the sky?
May
26
answered What must/do astronomers reveal beyond their academic papers?
May
19
answered What is a typical value for core-to-star efficiency?
May
3
comment Missing Terms in Weinberg's treatment of perturbations on Newtonian Cosmology
Uhm, I really can not see the reason... The only thing that come in my mind, is that the product of any operator nullifies. Perhaps, did you check that?
Apr
28
comment Missing Terms in Weinberg's treatment of perturbations on Newtonian Cosmology
What are $\vec X$ and $\vec q$?
Apr
28
revised Could our Sun be a companion star of a massive black hole?
edited title
Apr
28
comment Could our Sun be a companion star of a massive black hole?
"Can we track its orbit": does "its" stand for the Sun or for the BH? By "companion" you mean that the Sun is in a binary system? If so there are tens of threads about this already.
Apr
2
comment how to tell an optical spectrum is featureless or just with a low S/N?
Well, it wouldnt be bad if you could tell us what are these spectra about, where they come from, what do you expect there, which telescope took the spectra, if you can plot the background flux, and such "details". But no, let's put a picture and ask a 1-line hard question.