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

Author Question: Why do other systems have planetary types that don't fall neatly into the terrestrial and jovian ... (Read 74 times)

@Brianna17

  • Hero Member
  • *****
  • Posts: 550
Why do other systems have planetary types that don't fall neatly into the terrestrial and jovian categories that we identify in our solar system?
 
  What will be an ideal response?

Question 2

What types of observations are necessary to determine the motion of a star through space?
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cdmart10

  • Sr. Member
  • ****
  • Posts: 332
Answer to Question 1

There are several possible explanations. Hydrogen rich planets will vary greatly in density which is attributable to increases in temperature caused by their proximity to their host stars. Water worlds may be similar to our ice giants, but instead be dependent on when a star clears its nebular gas.

Answer to Question 2

To determine the true space motion of a star both the radial velocity and transverse velocities must be determined. The radial velocity can be determined directly from observing the spectrum and measuring the Doppler shift of the absorption lines. The transverse velocity is calculated from observations of a star's proper motion and distance. The proper motion is the angular motion per year of the star. Once the radial velocity and transverse velocities are known, the space motion of the star is calculated using the Pythagorean theorem (square root of the sum of the squares of the velocities).





 

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

For a complete list of videos, visit our video library