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

Author Question: Why must both parallax and proper motion be known to give transverse velocity? What will be an ... (Read 46 times)

chads108

  • Hero Member
  • *****
  • Posts: 507
on: Jul 27, 2018
Why must both parallax and proper motion be known to give transverse velocity?
 
  What will be an ideal response?

Question 2

Which of these is NOT typical of the Galaxy's spiral arms?
 
  A) open clusters
  B) Population II giants like orange Arcturus
  C) emission nebulae like M42
  D) hot, young blue Population I stars
  E) O and B stars


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jordin Calloway

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 27, 2018
Answer to Question 1

To turn the star's apparent motion across our line of sight into its real velocity in that direction, we also need to know the actual distance from parallax data.

Answer to Question 2

B


chads108

  • Member
  • Posts: 507
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

bigsis44

  • Member
  • Posts: 317
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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.

Fossils Give Us a View of Past Life Fossils Give Us a View of Past Life
Range of Motion of the Wrist and Hand Joints, Radial and Ulnar Deviation of the Wrist Range of Motion of the Wrist and Hand Joints, Radial and Ulnar Deviation of the Wrist
Injecting an IV push (bolus) medication; C, another type of needleless syringe and needleless IV acc Injecting an IV push (bolus) medication; C, another type of needleless syringe and needleless IV acc
Transverse Abdominal Section Transverse Abdominal Section
A Heliocentric Explanation of Retrograde Motion A Heliocentric Explanation of Retrograde Motion
Positive velocity graph Positive velocity graph
Video: Embryonic development - week 1 and 2

For a complete list of videos, visit our video library