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 37 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
Great answer, keep it coming :)

raili21

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

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?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

Did you know?

Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.

Elliptical Galaxy M32 Elliptical Galaxy M32
The cell membrane, cytoplasm, nucleus, and nucleolus. The cell membrane, cytoplasm, nucleus, and nucleolus.
Reed-Sternberg cells are large, abnormal lymphocytes that may contain more than one nucleus. These ... Reed-Sternberg cells are large, abnormal lymphocytes that may contain more than one nucleus. These ...
Cordilleran-Type Mountain Building Cordilleran-Type Mountain Building
Active Transport in Vesicles: Bulk Phase Endocytosis (Pinocytosis) Active Transport in Vesicles: Bulk Phase Endocytosis (Pinocytosis)
ABO blood type ABO blood type
Video: Osmosis - Isotonic, Hypotonic, and Hypertonic​ Solutions

For a complete list of videos, visit our video library