This topic contains a solution. Click here to go to the answer

Author Question: The amount by which you look into the past when you look at a distant galaxy, a duration equal to ... (Read 65 times)

karlynnae

  • Hero Member
  • *****
  • Posts: 599
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



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

triiciiaa

  • Sr. Member
  • ****
  • Posts: 349
Answer to Question 1

A

Answer to Question 2

B




karlynnae

  • Member
  • Posts: 599
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)


hramirez205

  • Member
  • Posts: 345
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

For a complete list of videos, visit our video library