Chapter 11 Astronomy

Which of the stars is oldest in terms of its life cycle?

• Betelgeuse
• Alpha Centauri B
• Sirius B
• Vega

Which of these stars are burning hydrogen?

• Betelgeuse
• Alpha Centauri B and Sirius B
• Vega and Belelgeuse
• Our Sun, Alpha Centauri B, and Vega

Which star(s) are burning helium?

• Betelgeuse
• Alpha Centauri B
• Sirius B
• Vega

Which star is closest to death?

• Vega
• our Sun
• Sirius B
• Alpha Centauri B

Which star has the highest luminosity?

• Betelgeuse
• Vega
• our Sun
• Sirius B

Main sequence stars will become red giants when they run out of what fuel?

• Helium
• Hydrogen
• Carbon

Is a main sequence star older or younger than a white dwarf?

• Older
• Younger

Was the star Sirius B ever a main sequence star?

• Yes
• No

What phase of the star life cycle will Vega enter next?

• Black dwarf
• Red giant
• White dwarf
• Supernova

What will be the next phase for Betelgeuse?

• White Dwarf
• Main sequence
• Supernova
• Black hole