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

Author Question: The letters AGN stand for a. three spectral types of stars. b. active planet. c. active star. ... (Read 70 times)

809779

  • Hero Member
  • *****
  • Posts: 579
on: Jul 27, 2018
The letters AGN stand for
 
  a. three spectral types of stars.
  b. active planet.
  c. active star.
  d. active galaxy nucleus.
  e. None of the other choices are correct.

Question 2

As a Sun-like main-sequence star exhausts hydrogen in its core, it next becomes
 
  a. a protostar.
  b. a red giant star.
  c. a white dwarf star.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Ahernandez18

  • Sr. Member
  • ****
  • Posts: 361
Reply #1 on: Jul 27, 2018
Answer to Question 1

d

Answer to Question 2

b


809779

  • Member
  • Posts: 579
Reply 2 on: Jul 27, 2018
Wow, this really help

sarah_brady415

  • Member
  • Posts: 328
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Types of selective media Types of selective media
Types of Neurons Types of Neurons
Mass Exchange Between Close Binary Stars Mass Exchange Between Close Binary Stars
Blood Groups and Blood Types Blood Groups and Blood Types
Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ... Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ...
Smooth Brittle Star. Smooth Brittle Star.
Video: Helper T cell receptors, activation, proliferation, differentiation & action

For a complete list of videos, visit our video library