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

Author Question: The key to finding quasars' distances was A) planetary nebula in M51. B) globular clusters in ... (Read 56 times)

sheilaspns

  • Hero Member
  • *****
  • Posts: 567
on: Jul 27, 2018
The key to finding quasars' distances was
 
  A) planetary nebula in M51.
  B) globular clusters in the halo of M87 in Virgo.
  C) a Type I supernova in the spiral arm of 3C87.
  D) the luminosity of 3C52 from the Doppler shift and the Fisher-Tully relation.
  E) the huge redshifts of the hydrogen lines in 3C273.

Question 2

Define shepherd moons and give an example of them at work.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kaykay69

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 27, 2018
Answer to Question 1

E

Answer to Question 2

The two small moons on each side of Saturn's F ring herd the particles into this narrow, twisted ring.


sheilaspns

  • Member
  • Posts: 567
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

carlsona147

  • Member
  • Posts: 341
Reply 3 on: Yesterday
Gracias!

« previous next »
 

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?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Globular protein structures are compact and varied. Human serum albumin Globular protein structures are compact and varied. Human serum albumin
A Dark Nebula A Dark Nebula
An H-R Diagram of a Globular Cluster An H-R Diagram of a Globular Cluster
Finding the equation of a line Finding the equation of a line
Finding the angle from a ratio Finding the angle from a ratio
finding the resultant force finding the resultant force
Video: Epidural Hematoma

For a complete list of videos, visit our video library