Author Question: The Sun is located at the edge of the galaxy, approximately 50,000 light-years from the galactic ... (Read 74 times)

WhattoUnderstand · **on:** Jul 27, 2018

The Sun is located at the edge of the galaxy, approximately 50,000 light-years from the galactic center.

Indicate whether the statement is true or false

Question 2

What is not a main source of evidence for the existence of dark matter?

A) massive blue stars
B) rotation curves of disk galaxies
C) stellar motions in elliptical galaxies
D) velocities and positions of galaxies in clusters of galaxies
E) gravitational lensing by clusters of galaxies