Multiple Choice
What physical process is taking place inside a star that is in the main-sequence phase of its life?
A) Hydrogen is being converted to helium in its core.
B) Hydrogen is being converted to helium in a shell around a core where no nuclear reactions are occurring.
C) The gas in the star is contracting gravitationally without nuclear reactions taking place.
D) Helium is being converted to carbon in its core.
Correct Answer:
Verified
Correct Answer:
Verified
Q58: Certain stages of stellar evolution,such as birth
Q59: In astronomical terms,planetary nebulae<br>A) exist around their
Q60: What kind of star is our Sun?<br>A)
Q61: Our Sun is currently undergoing the triple-alpha
Q62: All stars on the main sequence<br>A) are
Q64: A spectral class-G type of star would
Q65: The remains of large,exploded stars that have
Q66: A white dwarf is a(n)<br>A) object like
Q67: The final remnant of the evolution of
Q68: Which wavelength region is most useful for