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

Author Question: Rich galactic clusters ____. a. are rare, because galaxies are usually isolated in space b. ... (Read 26 times)

vicotolentino

  • Hero Member
  • *****
  • Posts: 552
on: Jul 27, 2018
Rich galactic clusters ____.
 
  a. are rare, because galaxies are usually isolated in space
  b. contain gas that is rich in metals
 c. are composed of mostly elliptical galaxies
 d. are very spread out, without a defined center
 e. contain a wide variety of galaxy types and sizes

Question 2

What must be used to maintain the optics and operation of an infrared telescope?
 
  a. filters
 b. lasers
 c. coolant
 d. oxygen
 e. tertiary mirrors


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

raenoj

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Jul 27, 2018
Answer to Question 1

c

Answer to Question 2

c


vicotolentino

  • Hero Member
  • *****
  • Posts: 552
Reply #2 on: Jul 27, 2018
Thanks


raenoj

  • Sr. Member
  • ****
  • Posts: 340
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

A rich diversity of life lives in and among coral reefs. A rich diversity of life lives in and among coral reefs.
Elliptical Galaxies Elliptical Galaxies
Gravitational Lensing of Extremely Distant Galaxies Gravitational Lensing of Extremely Distant Galaxies
Two stubby screwdrivers used to access screws that have limited space above. A straight blade is on ... Two stubby screwdrivers used to access screws that have limited space above. A straight blade is on ...
International space station International space station
Mass spectrometry for identifying an unknown protein isolated from a 2D gel Mass spectrometry for identifying an unknown protein isolated from a 2D gel
Video: PET Scan Animation

For a complete list of videos, visit our video library