« previous next »

Author Question: Discuss the population, size, and types of galaxies we find in our Local Group. What will be an ... (Read 46 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?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Detritivores are often classified according to their body size as microflora, microfauna, mesofauna, Detritivores are often classified according to their body size as microflora, microfauna, mesofauna,
Galaxies with Rings Galaxies with Rings
A group therapy session. A group therapy session.
How to find the derivatives of exponential functions How to find the derivatives of exponential functions
How to use L’Hospital’s Rule to find the limit of a function (Part 1) How to use L’Hospital’s Rule to find the limit of a function (Part 1)
Derive the following using the increment/delta method and find its slope Derive the following using the increment/delta method and find its slope
Video: Genetic terms Animation

For a complete list of videos, visit our video library