26) Considering Einstein’s famous equation, E = mc2, which of the following statements is true?

45) All the following statements are true. Which one follows directly from Kepler’s third law?

20) What is the origin of the elements that made up the solar protoplanetary nebula?

9) When a ball is dropped, most of the ball’s energy changes from

6) How does atmospheric turbulence affect telescopic observations?

5) How does adaptive optics improve the performance of a telescope?

47) In non-dispersive media, which travels fastest?

24) In what part of the electromagnetic spectrum do the biggest telescopes on Earth operate?

44) Orion is visible on winter evenings but not summer evenings because of

11) The energy of Earth’s rotation is an example of