« previous next »

Author Question: Describe the kind of observations that have led astronomers to believe that supermassive black holes ... (Read 53 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?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

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

The black-capped chickadee is a permanent resident in biomes with harsh winter conditions. The black-capped chickadee is a permanent resident in biomes with harsh winter conditions.
black cohosh black cohosh
Effect of a Black Hole’s Tidal Force on Infalling Matter Effect of a Black Hole’s Tidal Force on Infalling Matter
MAGENTA, BLACK, GREEN, ON ORANGE MAGENTA, BLACK, GREEN, ON ORANGE
How to describe transformations of a sinusoidal function (y=a*sin⁡b(x−c)+d) How to describe transformations of a sinusoidal function (y=a*sin⁡b(x−c)+d)
Describe the Conceptual Forecasting Framework in your own words. Describe the Conceptual Forecasting Framework in your own words.
Video: Chromosome structural organization/ Mechanisms for chromosome movement Animation

For a complete list of videos, visit our video library