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

Author Question: The orbits of most comets: A) are like the planets, fairly circular and in the ecliptic plane. ... (Read 69 times)

Sportsfan2111

  • Hero Member
  • *****
  • Posts: 585
The orbits of most comets:
 
  A) are like the planets, fairly circular and in the ecliptic plane.
  B) lie almost entirely beyond the orbit of Neptune.
  C) have perihelions within the orbits of Mercury.
  D) go no farther out than Pluto, then return to the Sun again.
  E) are shorter than the 76 year period for Comet Halley.

Question 2

Spiral arms are thought to be sites of ________, based on the observations of red HII regions and blue-white OB associations in and around these features.
 
  Fill in the blank(s) with correct word



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Bsand8

  • Sr. Member
  • ****
  • Posts: 327
Answer to Question 1

B

Answer to Question 2

star formation




Sportsfan2111

  • Member
  • Posts: 585
Reply 2 on: Jul 27, 2018
Excellent


ktidd

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

For a complete list of videos, visit our video library