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

Author Question: What evidence did astronomers use to prove jets travel in opposite directions? a. spectral lines ... (Read 96 times)

vicky

  • Hero Member
  • *****
  • Posts: 586
on: Jul 27, 2018
What evidence did astronomers use to prove jets travel in opposite directions?
 
  a. spectral lines from fast-moving red- and blue-shifted ionized gas
 b. gamma ray emission spectra
 c. magnetic tubes in accretion disks
 d. mass transfer from a binary star to a compact companion
 e. pulsar rotation periods

Question 2

Ancient astronomers often had difficulty explaining _____, the occasional westward motion of the planets.
 
  a. parallax
 b. eccentrics
 c. retrograde motion
  d. deferents
 e. epicycles


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Sammyo

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

c


vicky

  • Member
  • Posts: 586
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

jojobee318

  • Member
  • Posts: 298
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

More than 4.4billion prescriptions were dispensed within the United States in 2016.

Evidence of Water on Mars Evidence of Water on Mars
Secondary intravenous lines: (b) an intravenous piggyback (IVPB) alignment Secondary intravenous lines: (b) an intravenous piggyback (IVPB) alignment
Common skin signs are often evidence of an illness or disorder. A pustule is a small, elevated, ... Common skin signs are often evidence of an illness or disorder. A pustule is a small, elevated, ...
Common skin signs are often evidence of an illness or disorder. A scale is a thin, dry flake of ... Common skin signs are often evidence of an illness or disorder. A scale is a thin, dry flake of ...
Lines of the anterior thorax Lines of the anterior thorax
Prove the following Trig Identities Prove the following Trig Identities
Video: Stages of Mitosis - Prophase, Prometaphase, Metaphase, Anaphase & Telophase

For a complete list of videos, visit our video library