Examlex
The center of the galaxy has been studied extensively using visible light.
Q7: Gentle gravitational tidal forces appear to be
Q17: The jets emitted by compact objects are
Q18: How have astronomers determined the mass of
Q24: The type of radiation that is emitted
Q24: Black holes erupt when matter flows into
Q28: The best explanation for the activity at
Q36: What occurs during nuclear fusion within the
Q39: The heavy bombardment of the early Solar
Q42: All elliptical galaxies are more massive than
Q60: Seventy five percent of Earth's surface is