1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vovikov84 [41]
3 years ago
12

The Andromeda galaxy is the closest major galaxy to our own. Andromeda shows a distinct blue-shift of light when we analyze it.

What can we conclude about the Andromeda galaxy?
Physics
1 answer:
saul85 [17]3 years ago
4 0
At the present time, the only way we know of that light can get shifted
toward the blue end of the spectrum is the Doppler effect ... wavelengths
appear shorter than they should be when the source is moving toward us. 

IF that's true in the case of the Andromeda galaxy, it means the galaxy is
moving toward us.

We use the same reasoning to conclude that all the galaxies whose light is red-shifted are moving away from us.  That includes the vast majority of all galaxies that we can see, and it strongly supports the theory of the big bang
and the expanding universe.

If somebody ever comes along and discovers a DIFFERENT way that light
can get shifted to new, longer or shorter wavelengths, then pretty much all
of modern Cosmology will be out the window.  There's a lot riding on the
Doppler effect !
You might be interested in
At which temperature does the motion of atoms and molecules stop?
Scorpion4ik [409]

Answer:

0 Kelvin

Explanation:

Atoms in absolute temperature get approximatelly motionless since 0 Kelvin is -273 degrees Celcius. The kinetic energy of atoms/particles in matter has the possible lowest value ( almost zero), so that there is nothing colder than 0 Kelvin.

4 0
3 years ago
What causes glowsticks to give off light?
iren2701 [21]
Phenyl oxalate ester is responsible for the luminescence in aglow stick<span>. The reaction with hydrogen peroxide </span>causes<span> the liquid inside a </span><span>glow stick to glow</span>
3 0
3 years ago
The Earths magnetic field deflects the flow of current from?
Zarrin [17]
<span>Most of the earth's fresh water is stored as ice in the Arctic and Antarctic regions of the globe.</span>
5 0
3 years ago
Which of the following is a force acting at a distance
wariber [46]
D. gravitational force. is your answer hope this helps
8 0
3 years ago
Read 2 more answers
Temperature is independent of mass<br><br> A- True<br><br> B- False
Naily [24]

Answer:

False. Temperature is independent of volume

6 0
3 years ago
Read 2 more answers
Other questions:
  • A. What are the three longest wavelengths for standing waves on a 240-cm-long string that is fixed at both ends?
    10·1 answer
  • Why do clouds tend to form well above the ground?
    10·2 answers
  • he Constitution made no mention of how many justices should sit on the Supreme Court. Which statement regarding how the number o
    9·1 answer
  • A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250-kg crate. What is
    6·1 answer
  • What is the charge on a hypothetical ion with 35 protons and 33 electrons?
    11·1 answer
  • Traditional explosives use the energy released by chemical reactions. Nuclear weapons use the energy released by nuclear reactio
    14·2 answers
  • Which three forms of light are invisible light?
    9·2 answers
  • A cell supplies current of 0.6A and 0.2A through 1ohms and 4.0ohms resistor respectively. Calculate the internal resistance of t
    13·1 answer
  • Please answer all three answers
    11·1 answer
  • What can be correctly concluded from this experiment?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!