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During star formation, the dense parts of the molecular cloud that collect material while contracting and heating up are known as

A star’s lifetime, luminosity, and eventual fate is determined by

The chromosphere of the sun has a distinctive red/pink color. Emission nebulae also have thisdistinctive color. What is the source of this red/pink appearance?     

What would happen to the Earth if the sun suddenly became a black hole? (ignore the temperature change)

Which of the following would be considered a Reflection Nebula?

The absolute magnitude of a star is defined to be the apparent magnitude that the star would have if it were at a standard distance of _____ parsec(s).

Which point on the Hertzprung-Russell diagram represents the main sequence star with the shortest lifetime?

What is the minimum mass requires for a star?

  The Sun’s spectrum (as seen above) is an example of a(n) __________.

Use the following table to answer the question. Star Apparent Magnitude (m) Absolute Magnitude (M) m-M Spectral Type 1 -1.46 1.46 0 F0 2 -0.72 -2.5 1.78 A1 3 0.12 -8.1 8.22 B8 4 0.41 -7.2 7.61 M2 5 -0.27 4.4 -4.67 G2     In which star’s spectrum are the hydrogen lines the strongest?