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

Author Question: When we say that a cluster of galaxies is acting as a gravitational lens, what do we mean? A) It ... (Read 8 times)

ss2343

  • Hero Member
  • *****
  • Posts: 548
on: Jul 27, 2018
When we say that a cluster of galaxies is acting as a gravitational lens, what do we mean?
 
  A) It magnifies the effects of gravity that we see in the cluster.
  B) It is an unusually large cluster that has a lot of gravity.
  C) It bends or distorts the light coming from galaxies located behind it.
  D) The overall shape of the cluster is that of a lens.

Question 2

What kind of object do we think lies in the center of the Milky Way Galaxy?
 
  A) a 3- to 4-million-solar-mass black hole
  B) a gigantic X-ray binary system
  C) a dense cluster of young, hot stars
  D) an enormous collection of dark matter, which explains why we detect no light at all from the galactic center


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

elizabethrperez

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

A


ss2343

  • Member
  • Posts: 548
Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

DylanD1323

  • Member
  • Posts: 314
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Cataract. When the pupil is dilated, an abnormal opacity or whiteness of the lens can be observed in Cataract. When the pupil is dilated, an abnormal opacity or whiteness of the lens can be observed in
Lens Lens
Indirect-Acting Cholinergic Agnostic Agents Indirect-Acting Cholinergic Agnostic Agents
What would your average (mean) number of cells per cluster be? What would your average (mean) number of cells per cluster be?
Gravitational Potential Energy Gravitational Potential Energy
Question about Resultant of gravitational force? Question about Resultant of gravitational force?
Video: Barriers - eye structures, digestive mucosa, respiratory mucosa & genitourinary mucosa

For a complete list of videos, visit our video library