This topic contains a solution. Click here to go to the answer

Author Question: You observe a low-mass helium white dwarf. What can you conclude? A) It is over 100 billion years ... (Read 44 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
You observe a low-mass helium white dwarf. What can you conclude?
 
  A) It is over 100 billion years old.
  B) It will soon be a planetary nebula.
  C) It is part of a binary star system.
  D) Its core is mostly carbon.
  E) It was once a blue supergiant.

Question 2

The book discussed two different zones of habitability; describe and compare them.
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fauacakatahaias

  • Sr. Member
  • ****
  • Posts: 353
Answer to Question 1

C

Answer to Question 2

For stars, their zones would lie close enough to the star for planets like Earth to have liquid water oceans, but not so close they would turn into Venus. For the Sun, this zone extends from the orbits of Venus out to Mars. The brighter the star, the larger this zone around it would extend. But the Galactic zone would be more related to the potential for an active nucleus to create so much energy in a quasar-like phase to wipe out life near it on the inside, and on the outside to the fact that at the outer edge of the disk, the rate of star formation (and planet formation as well) drops off greatly; for the Milky Way, this zone is probably about 10,000 to 50,000 light years from the center.




londonang

  • Member
  • Posts: 540
Reply 2 on: Jul 27, 2018
Gracias!


nguyenhoanhat

  • Member
  • Posts: 332
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

For a complete list of videos, visit our video library