Author Question: The amount by which you look into the past when you look at a distant galaxy, a duration equal to ... (Read 73 times)

karlynnae · **on:** Jul 27, 2018

The amount by which you look into the past when you look at a distant galaxy, a duration equal to the distance to the galaxy in light-years, is referred to as the__________.

A) look-back time
B) sidereal period
C) synodic period
D) distance ladder

Question 2

A megaparsec (Mpc) is equal to _____.

A) 3.3 thousand ly
B) 3.3 million ly
C) 3.3 billion ly
D) 3.3 trillion ly