Blog

The Chandrasekhar mass limit for a white dwarf is:

The Hertzsprung-Russell Diagram plots luminosity against ______________.

What temperature is needed for the proton-proton chain fusion reaction?

What can we conclude about the relative properties of stars B and D?

Regarding the three stars in the comparison above, which star is closer than 10 pc from Earth? Comparing the Relative Brightness of Three Stars Star Absolute Apparent A 2.3 1.2 B -1.5 3.4 C 2.6 2.6  

You observe a galaxy that does not have a disk or any star formation and is very spherical in shape. It would most likely be classified a

What happens when an interstellar cloud fragment shrinks?

The figure below is named for which famous astronomer?

A tightly wound, barred spiral galaxy would, in Hubble’s system, be:

Refer to the figure above. What is the name of the phase at point 9?