Discuss the population, size, and types of galaxies we find in ...

[washai]

Discuss the population, size, and types of galaxies we find in our Local Group.
 
  What will be an ideal response?

Question 2

The public debate about Martian canals was not resolved until
 
  A) many scientists were unable to reproduce Percival Lowell's sketches of Martian canals
  B) the governing body of astronomy, the International Astronomical Union made an official statement on the matter
  C) the first spacecraft flew past Mars in 1965
  D) the first spacecraft landed on Mars in 1976

[momolu]

Answer to Question 1

With 45 members, the Local Group is about 1 Mpc across. All types are found, with most being dwarf ellipticals and irregulars. The two main members are M31 in Andromeda, and our own Milky Way, both big spirals around which most of the smaller galaxies cluster.

Answer to Question 2

C