This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Good tracers of the spiral arms of our galaxy are all I. very old. II. very young. III. very ... (Read 20 times)

JMatthes

  • Hero Member
  • *****
  • Posts: 578
on: Jul 27, 2018
Good tracers of the spiral arms of our galaxy are all I. very old. II. very young. III. very luminous. IV. moving with large radial velocities.
 
  a. I & III
  b. I & IV
  c. II & III
  d. II & IV
  e. I, III, & IV

Question 2

What measurements are needed to determine the orbital motion of a spectroscopic binary star?
 
  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

reversalruiz

  • Sr. Member
  • ****
  • Posts: 327
Reply #1 on: Jul 27, 2018
Answer to Question 1

c

Answer to Question 2

Measure the spectra of the binary system over time and determine the Doppler shifts of the spectral lines from each star.


JMatthes

  • Member
  • Posts: 578
Reply 2 on: Jul 27, 2018
:D TYSM

kusterl

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Young male Pacific Walruses on Cape Pierce in Alaska. Note the variation in the curvature and orient Young male Pacific Walruses on Cape Pierce in Alaska. Note the variation in the curvature and orient
Young gorilla in tree Young gorilla in tree
Seyfert Galaxy NGC 1566 Seyfert Galaxy NGC 1566
Children in Baltimore (1909) pull the stringy parts from beans in preparation for canning. Photograp Children in Baltimore (1909) pull the stringy parts from beans in preparation for canning. Photograp
Young adults with low levels of parental support report significantly better scores on measures of ... Young adults with low levels of parental support report significantly better scores on measures of ...
Video: Virtual Enzyme Kinetics & Lineweaver Burk Plot

For a complete list of videos, visit our video library