Author Question: Which of the following best explains why we can rule out the idea that planets are usually formed by ... (Read 34 times)

olgavictoria

  • Hero Member
  • *****
  • Posts: 528
Which of the following best explains why we can rule out the idea that planets are usually formed by near-collisions between stars?
 
  A) Studies of the trajectories of nearby stars relative to the Sun show that the Sun is not in danger of a near-collision with any of them.
  B) Stellar near-collisions are far too rare to explain all the planets now known to orbit nearby stars.
  C) A near collision might have created planets, but it could not have created moons, asteroids, or comets.
  D) A near collision should have left a trail of gas extending out behind the Sun, and we see no evidence of such a trail.

Question 2

Which of the following are irregularities in our solar system that must be explainable in models of planetary formation?
 
  A) Venus' low rate of rotation
  B) Mars' north-south asymmetry
  C) the tilt of Uranus' rotation axis
  D) binary Kuiper Belt objects
  E) All of the above



yasmin

  • Sr. Member
  • ****
  • Posts: 319
Answer to Question 1

B

Answer to Question 2

E



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

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?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

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.

For a complete list of videos, visit our video library