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

Author Question: On a dark summer night in the northern hemisphere, we can see the Milky Way, but we can't see the ... (Read 75 times)

james0929

  • Hero Member
  • *****
  • Posts: 586
on: Jul 27, 2018
On a dark summer night in the northern hemisphere, we can see the Milky Way, but we can't see the center of the Milky Way. Why not?
 
  A) Interstellar dust and gas absorb and scatter visible light.
  B) We are in the center of the Milky Way.
  C) There are no stars in the center of the Milky Way, just a supermassive black hole.
  D) The center of the Milky Way does not emit enough visible light.

Question 2

How does Hubble's law relate cosmological redshift to distance?
 
  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

Dunkey

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

The redshift corresponds to recessional velocity and, according to Hubble's Law, the greater the redshift, the greater the velocity. The greater the velocity, the more distant the galaxy is.


james0929

  • Member
  • Posts: 586
Reply 2 on: Jul 27, 2018
:D TYSM

shewald78

  • Member
  • Posts: 340
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
A Dark Nebula A Dark Nebula
Northern Lights on a Clear Winter Night Northern Lights on a Clear Winter Night
Night Attack on the Sanjo Palace (detail), from the Scrolls of Events of the Heiji Period. Night Attack on the Sanjo Palace (detail), from the Scrolls of Events of the Heiji Period.
Structural MRIs reveal cortical loss in adolescent patients with schizophrenia. Here dark blue ... Structural MRIs reveal cortical loss in adolescent patients with schizophrenia. Here dark blue ...
Northern and Southern Hemispheres Northern and Southern Hemispheres
Video: How eudicots (true dicots) differ from monocots Animation

For a complete list of videos, visit our video library