« previous next »

Author Question: Describe the kind of observations that have led astronomers to believe that supermassive black holes ... (Read 57 times)

jake

  • Hero Member
  • *****
  • Posts: 538
on: Jul 27, 2018
Describe the kind of observations that have led astronomers to believe that supermassive black holes lie at the center of many galaxies.
 
  What will be an ideal response?

Question 2

Helium fusion does not begin until the star has entered the giant region of the H-R diagram.
 
  a. True
  b. False
  Indicate whether the statement is true or false


jointhecircus

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 27, 2018
Answer to Question 1

Measurements show that the stars near the centers of most galaxies are orbiting very rapidly. To hold stars in such small, short-period orbits, the centers of galaxies must contain millions or even billions of solar masses in a very small region.

Answer to Question 2

True


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

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

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

The Black Bee-eater (Merops gularis) is a species of bird in the Meropidae family. The Black Bee-eater (Merops gularis) is a species of bird in the Meropidae family.
Black Locust Black Locust
Mass Loss by a Supermassive Star Mass Loss by a Supermassive Star
The Ku Klux Klan forces John Campbell, a black man, to beg for his life in Moore County, North Carol The Ku Klux Klan forces John Campbell, a black man, to beg for his life in Moore County, North Carol
Black female Vs. Gray male Black female Vs. Gray male
Describe the Conceptual Forecasting Framework in your own words. Describe the Conceptual Forecasting Framework in your own words.
Video: Five phases of cardiac cycle & Atrial contraction

For a complete list of videos, visit our video library