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 62 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
Great answer, keep it coming :)

kusterl

  • Member
  • Posts: 315
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Jets Created by a Black Hole in a Binary System Jets Created by a Black Hole in a Binary System
Evidence-based practice: skin assessment Evidence-based practice: skin assessment
Hall-effect switches use metallic shutters to shunt magnetic lines of force away from a silicon ... Hall-effect switches use metallic shutters to shunt magnetic lines of force away from a silicon ...
The adsorption spectrum of rhodopsin compared with the human scotopic spectral sensitivity curve. The adsorption spectrum of rhodopsin compared with the human scotopic spectral sensitivity curve.
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.
Early geologists discovered evidence of past glaciations in U-shaped valleys Early geologists discovered evidence of past glaciations in U-shaped valleys
Video: Passive Smoke Exposure

For a complete list of videos, visit our video library