Multiple Choice
Cosmic rays in the Milky Way are important to study because
A) these energetic photons easily penetrate Earth's atmosphere.
B) they can be collected and used to generate electricity.
C) they provide information about the most energetic events in the universe.
D) they are leftover particles from the formation of the Galaxy.
E) they can influence the motion of stars in the halo.
Correct Answer:
Verified
Correct Answer:
Verified
Q43: The location, motion, and heavy-element enrichment of
Q44: What is a cosmic ray? Do cosmic
Q45: These three barred spirals are the largest
Q46: Astronomers expect life to be rare (and
Q47: Somebody shows you the picture in the
Q49: What would be the apparent angular size
Q50: Why is 21-cm radiation one of the
Q51: If you wanted to study the properties
Q52: If dust is present between Earth and
Q53: Name at least two objects that are