All Questions
Tagged with fundamental-astronomy units
4
questions
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What is value of charge by mass ratio (q/m) for a spherical micro charged particle with surface potential 6 volts in S.I units and in e/amu units?
In Liu and Ip (2014),The Astrophysical Journal, 786:34 (8pp), the value of q/m is derived as follows :
"for a dust grain with radius 'a', from $\phi = \frac{4\pi q}{\varepsilon_0 a}$ we have $\...
- 145
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Finding the radius of a star in arcsec
If i know the radius r of a star in cm, how can I convert it to arcseconds?
For example, if I have a star with r = 3.18e13 cm, and distance to the star d = 220 parsecs, what is the relation to ...
- 69
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Units of integrated flux density (irradiance) along longitudes
If I've taken an image of the Galactic bulge with the pixel units in MJ per steradian:
and I've looked down each column of the image and added up the values:
then do the units change? My thinking is ...
- 2,620
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Basic celestial data
complete beginner here, only got into star gazing a few days ago using my friend's telescope and I don't really understand at all what any of the measurements mean.
Anyway, talk about jumping in the ...
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