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 ...
- 7,170
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 ...
- 115k
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 ...
- 677
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 ...
- 11k
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 ...
- 10.3k
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