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 64 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?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

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

For a complete list of videos, visit our video library