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

Author Question: A__________is a type of active galaxy nucleus that is especially variable and has few or no spectral ... (Read 21 times)

nenivikky

  • Hero Member
  • *****
  • Posts: 516
on: Jul 27, 2018
A__________is a type of active galaxy nucleus that is especially variable and has few or no spectral emission lines.
 
  A) blazar
  B) pulsar
  C) quasar
  D) quark

Question 2

In the context of measuring the properties of galaxies, a__________is an object of known brightness that astronomers use to find distance.
 
  A) black hole
  B) white dwarf
  C) standard candle
  D) red giant


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kardosa007

  • Sr. Member
  • ****
  • Posts: 300
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

C


nenivikky

  • Member
  • Posts: 516
Reply 2 on: Jul 27, 2018
Wow, this really help

chereeb

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

An example of a homeostatically controlled variable: blood levels of glucose in a human. An example of a homeostatically controlled variable: blood levels of glucose in a human.
Sombrero Galaxy (M104) Sombrero Galaxy (M104)
Suture Use, Size, and Type of Material Suture Use, Size, and Type of Material
Active fuel management includes many different components and changes to the oiling system, which ... Active fuel management includes many different components and changes to the oiling system, which ...
Noid lights are usually purchased as an assortment so that one is available for any type or size ... Noid lights are usually purchased as an assortment so that one is available for any type or size ...
Andean-Type Mountain Building Andean-Type Mountain Building
Video: Retina

For a complete list of videos, visit our video library