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

Author Question: Who first attempted to find our position in the Galaxy, how did he do this, and why was his model ... (Read 32 times)

danielfitts88

  • Hero Member
  • *****
  • Posts: 535
Who first attempted to find our position in the Galaxy, how did he do this, and why was his model flawed?
 
  What will be an ideal response?

Question 2

Eta Carinae is an example of a:
 
  A) black hole.
  B) supermassive star.
  C) red dwarf.
  D) nebula.
  E) stellar nursery.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

vkodali

  • Sr. Member
  • ****
  • Posts: 357
Answer to Question 1

William Herschel relied on star counts, and found most stars lie near the plane of the Milky Way, and in about equal numbers in all directions within this plane. He naturally took this to mean we lay near the center of a thin disk about 10,000 light years across. But dust near us blocks the vast majority of the Galaxy in visible wavelengths, so Herschel's survey included less than 10 of the whole Galaxy.

Answer to Question 2

B





 

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

For a complete list of videos, visit our video library