The bending of distant starlight by a closer object, resulting in a temporary brightening of the ...

The bending of distant starlight by a closer object, resulting in a temporary brightening of the star, is called ________.
 
  Fill in the blank(s) with correct word

Question 2

Young open clusters contain a lot of hot, young blue-white stars.
 
  Indicate whether the statement is true or false

Question 3

Our most detailed knowledge of Uranus and Neptune comes from
 
  A) ground-based radio telescopes.
  B) spacecraft exploration.
  C) ground-based visual telescopes.
  D) the Hubble Space Telescope.
  E) manned missions.

Question 4

At a temperature of ________, protons and neutrons combined to form deuterium and start cosmic nucleosynthesis.
 
  Fill in the blank(s) with correct word

Question 5

Globular clusters are typically much older than open clusters.
 
  Indicate whether the statement is true or false