« previous next »

Author Question: Galactic disks appear blue because: A) they contain no G, K, or M dwarfs. B) they contain only ... (Read 24 times)

neverstopbelieb

  • Hero Member
  • *****
  • Posts: 534
on: Jul 27, 2018
Galactic disks appear blue because:
 
  A) they contain no G, K, or M dwarfs.
  B) they contain only blue reflection nebulae.
  C) dust obscures the longer, red, wavelengths.
  D) O and B blue giants are much brighter than G, K, or M dwarfs.
  E) dark matter gravitationally shifts all wavelengths towards the blue.

Question 2

Discovered by the spacecraft Galileo, Dactyl is a satellite of larger Ida.
 
  Indicate whether the statement is true or false


fur

  • Sr. Member
  • ****
  • Posts: 309
Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

TRUE


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

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?

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

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Great Blue Hole of Belize Great Blue Hole of Belize
Virgin Galactic Virgin Galactic
John Marin, Untitled (The Blue Sea). John Marin, Untitled (The Blue Sea).
The yellow, blue, and green sections of the Emergency Response Guidebook (ERG). The yellow section ... The yellow, blue, and green sections of the Emergency Response Guidebook (ERG). The yellow section ...
Video: Osmosis - water transport

For a complete list of videos, visit our video library