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

Author Question: The visible parts of galaxies contribute about 10 percent of the critical density of the universe. ... (Read 69 times)

Jipu 123

  • Hero Member
  • *****
  • Posts: 569
The visible parts of galaxies contribute about 10 percent of the critical density of the universe.
 
  Indicate whether the statement is true or false

Question 2

Answer each of the following questions for our local sky.
 
  A. Where is the north celestial pole in our sky?
  B. Is Polaris a circumpolar star in our sky? Explain.
  C. Describe the meridian in our sky.
  D. Describe the celestial equator in our sky.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

lauravaras

  • Sr. Member
  • ****
  • Posts: 347
Answer to Question 1

FALSE

Answer to Question 2

A. Answers will vary with latitude; here is a sample for 40N: The north celestial pole appears at an altitude of 40, in the direction due north.
B. Yes, for any location in the Northern Hemisphere; no, for any location in the Southern Hemisphere. Polaris is circumpolar because it never rises or sets in our sky. It makes a daily circle, less than 1 in radius, around the north celestial pole.
C. The meridian is a half-circle that stretches from the due south point on the horizon, through the zenith, to the due north point on the horizon.
D. Answers will vary with latitude; here is a sample answer for 40N: The celestial equator is a half-circle that stretches from the due east point on the horizon, through an altitude of 50 due south, to the due west point on the horizon.




Jipu 123

  • Member
  • Posts: 569
Reply 2 on: Jul 27, 2018
Excellent


aliotak

  • Member
  • Posts: 326
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

For a complete list of videos, visit our video library