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

Author Question: Why do astronomers believe that there is a large black hole, around 4 million times the mass of our ... (Read 86 times)

Themember4

  • Hero Member
  • *****
  • Posts: 538
on: Jul 27, 2018
Why do astronomers believe that there is a large black hole, around 4 million times the mass of our Sun, in the Galactic center?
 
  What will be an ideal response?

Question 2

All the following statements are true. Which one follows directly from Kepler's third law (p2 = a3)?
 
  A) Venus orbits the Sun at a slower average speed than Mercury.
  B) Venus is more massive than Mercury.
  C) Venus takes longer to rotate than it does to orbit the Sun.
  D) Venus has a thicker atmosphere than Mercury.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jonathanballen97

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 27, 2018
Answer to Question 1

Observations of the Galactic center show a large amount of energy being produced. Radio observations show a ring of gas with a high rotation speed around the center, showing a very large mass. The structure seen in higher resolution radio observations is peculiar. These observations are consistent with an accretion disk around a supermassive black hole.

Answer to Question 2

A


Themember4

  • Member
  • Posts: 538
Reply 2 on: Jul 27, 2018
Gracias!

jamesnevil303

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

The average adult has about 21 square feet of skin.

Oil Refineries Are Large and Complex Facilities Oil Refineries Are Large and Complex Facilities
What type of errors are these: calling only large dogs a dog and calling a dog a kitty? What type of errors are these: calling only large dogs a dog and calling a dog a kitty?
Muhammad Placing the Black Stone on His Cloak, from Rashid al-Din's Jami al-Tawarikh ... Muhammad Placing the Black Stone on His Cloak, from Rashid al-Din's Jami al-Tawarikh ...
David Usher - Black Black Heart David Usher - Black Black Heart
Three-dimensional models of the small and large subunits of ribosomes. Three-dimensional models of the small and large subunits of ribosomes.
Ripening black cherries (Prunus serotina) release ethylene that stimulates abscission of the fruits Ripening black cherries (Prunus serotina) release ethylene that stimulates abscission of the fruits
Video: Major Elements in Biological Molecules: Nucleic acids

For a complete list of videos, visit our video library