Multiple Choice
What is microlensing?
A) A minute shift in the apparent position of a star as an object passes in front of it
B) A slow brightening of a star as an object passes in front of it
C) The temporary disappearance of a star as an object passes in front of it
D) A gradual reduction in brightness of a star as an object passes in front of it
Correct Answer:

Verified
Correct Answer:
Verified
Q14: Which of the following locations in our
Q15: The center of our Milky Way Galaxy
Q16: A rotation curve allows astronomers to calculate<br>A)
Q17: Where in space would you look for
Q18: Where are the youngest stars in the
Q18: In 1785, William Herschel proposed that the
Q20: The possible presence of a very large
Q22: When protons and electrons in neutral hydrogen
Q23: In the 1790s,Sir William Herschel tried to
Q24: What observations lead to the conclusion that