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 61 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
Wow, this really help

rleezy04

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Evidence that Light Travels at a Finite Speed Evidence that Light Travels at a Finite Speed
Swabbing a Petri dish to spread apart colonies. Bacitracin disk is used to prove the presence or ... Swabbing a Petri dish to spread apart colonies. Bacitracin disk is used to prove the presence or ...
Anatomical directions in representative vertebrates, my cats Sambala and Rastaman. Anatomical directions in representative vertebrates, my cats Sambala and Rastaman.
Two wells are filled with different antigens and when they diffuse, they form lines that cross which ... Two wells are filled with different antigens and when they diffuse, they form lines that cross which ...
Metastatic process: Tumor leaving primary site to travel to other distant organs to grow. Metastatic process: Tumor leaving primary site to travel to other distant organs to grow.
Individuals from highly divergent lines created by artificial selection Individuals from highly divergent lines created by artificial selection
Video: Phases of the ovarian cycle

For a complete list of videos, visit our video library