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To find the __________ velocity, we must combine proper motion and parallax data.

In general, the more massive the star, the longer its lifetime.

The _____________ magnitude of a star depends on its luminosity and distance from us.

The strongest lines present in spectral class A stars are absorption lines of __________ .

White dwarfs like Sirius B are typically the size of __________ .

The vast majority of stars near us in space would fall to the bottom right on the H-R diagram.

At its brightest, Venus, at magnitude -4, is 100 times brighter than a 1st magnitude star.

If Vega is apparent magnitude zero, and Deneb first magnitude, then:

A star’s absolute magnitude is its apparent brightness as seen from:

Main sequence stars are fusing hydrogen into helium in their cores.