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

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

Which of the following can be used as standard candles for determining distance?

What does the color of a star directly tell us about the star?

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     Which star has the largest mass?

What is the minimum mass requires for a star?

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

What is the likely final fate of a star whose mass is 25 solar masses after it has finished its nuclear burning phases?

Extremely high mass (20-30 solar masses) stars have large cores. When they die they will most likely end up as a

Which of the following would be considered an Emission Nebula?