« previous next »

Author Question: Discuss the population, size, and types of galaxies we find in our Local Group. What will be an ... (Read 47 times)

washai

  • Hero Member
  • *****
  • Posts: 523
on: Jul 27, 2018
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

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Jul 27, 2018
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Nursing student will find it funny Nursing student will find it funny
How to use the closed interval method to find absolute maximum and minimum values How to use the closed interval method to find absolute maximum and minimum values
Basal cell carcinoma is a local contraindication for massage. Basal cell carcinoma is a local contraindication for massage.
Methyl group metabolism and homocystinuria Methyl group metabolism and homocystinuria
Three Types of Lipids The three types of lipids vary in structure Three Types of Lipids The three types of lipids vary in structure
Find the torsion about the male neck? Find the torsion about the male neck?
Video: Brain Anatomy Animation (Part 2 of 2)

For a complete list of videos, visit our video library