New answers tagged galaxy
2
votes
Accepted
Method to get data from NED IPAC and NVSS, without manually giving RA/dec input
Unfortunately although a lot of astronomy image/catalog services allow uploading a file of object names or coordinates to query, it seems the NVSS postage stamp server is not one of them. The only way ...
3
votes
Accepted
redshift puzzle
But $\Delta \lambda$ does depend on $\lambda_0$. The wavelength redshift is not a uniform value.
In order to (correctly) do the redshift estimation by cross-correlation, your spectra should have been ...
5
votes
Accepted
How many stars can we resolve?
I tried to get a estimate for an upper-bound with currently deployed instruments. Assuming that, resolution-wise, the James Webb Space Telescope is the best telescope we have today, I looked into its ...
10
votes
Accepted
What are those stars that cross the galactic center?
Nice question and interesting data! Going through the references of the linked site, one gets a more verbose description of the video:
After more than 1,000 nights of observations spread over 15 ...
3
votes
Distribution function for distance to nearest stars from any given star in our galaxy
We can treat this as a Poisson point process: the probability that there are $N$ points inside a volume $V$ with point density is $\rho$ $$\Pr[N|V,\rho]=\frac{(\rho V)^N}{N!}e^{-\rho V}.$$ This ...
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Related Tags
galaxy × 661milky-way × 90
star × 72
observational-astronomy × 46
cosmology × 46
galactic-dynamics × 40
galaxy-cluster × 35
dark-matter × 33
distances × 31
redshift × 30
black-hole × 29
solar-system × 29
universe × 29
astrophysics × 27
gravity × 26
galaxy-center × 25
spectra × 24
data-analysis × 23
supermassive-black-hole × 22
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