directions: using the diagrams above, circle whether each star or galaxy has a spectrum that is red or blue…

directions: using the diagrams above, circle whether each star or galaxy has a spectrum that is red or blue shifted, and if the galaxy is receding or approaching in the table below.\ngalaxy name\tspectrum is -shifted (circle one)\tthis galaxy is... (circle one)\nvirgo a\tred or blue\treceeding or approaching\nandromeda\tred or blue\treceeding or approaching\nthe coma pinwheel galaxy\tred or blue\treceeding or approaching\ncetus a\tred or blue\treceeding or approaching\nm58 spiral galaxy in virgo\tred or blue\treceeding or approaching\nm109 spiral galaxy in ursa major\tred or blue\treceeding or approaching\nm65 spiral galaxy in leo\tred or blue\treceeding or approaching\nconclusion questions:\n1. what can you infer about the motion of the majority of these galaxies?\n2. if this is the same motion of virtually all galaxies in the universe, what can you infer about the general movement and size of the universe? movement: size:\n3. assuming your answer from question two is correct, what can you infer about the size of the universe as you go further and further back into the past?\n4. based on your observation of andromeda’s hydrogen spectrum, how is the movement of andromeda different from the movement of the other galaxies?\n5. what problem may this pose for our galaxy in the future?\n6. describe the evidence we see from stars’ spectra that supports the claim of the big bang theory.

directions: using the diagrams above, circle whether each star or galaxy has a spectrum that is red or blue shifted, and if the galaxy is receding or approaching in the table below.\ngalaxy name\tspectrum is -shifted (circle one)\tthis galaxy is... (circle one)\nvirgo a\tred or blue\treceeding or approaching\nandromeda\tred or blue\treceeding or approaching\nthe coma pinwheel galaxy\tred or blue\treceeding or approaching\ncetus a\tred or blue\treceeding or approaching\nm58 spiral galaxy in virgo\tred or blue\treceeding or approaching\nm109 spiral galaxy in ursa major\tred or blue\treceeding or approaching\nm65 spiral galaxy in leo\tred or blue\treceeding or approaching\nconclusion questions:\n1. what can you infer about the motion of the majority of these galaxies?\n2. if this is the same motion of virtually all galaxies in the universe, what can you infer about the general movement and size of the universe? movement: size:\n3. assuming your answer from question two is correct, what can you infer about the size of the universe as you go further and further back into the past?\n4. based on your observation of andromeda’s hydrogen spectrum, how is the movement of andromeda different from the movement of the other galaxies?\n5. what problem may this pose for our galaxy in the future?\n6. describe the evidence we see from stars’ spectra that supports the claim of the big bang theory.

Answer

Explanation:

Step1: Recall Doppler - shift concept

In astronomy, a red - shifted spectrum indicates a receding object and a blue - shifted spectrum indicates an approaching object.

Step2: Analyze each galaxy

For Virgo A, Cetus A, The Coma Pinwheel Galaxy, M58 Spiral Galaxy in Virgo, M109 Spiral Galaxy in Ursa Major, M65 Spiral Galaxy in Leo, assume they are red - shifted and receding (as per general cosmic expansion). Andromeda is approaching our galaxy, so it is blue - shifted.

GALAXY NAME SPECTRUM IS - SHIFTED (circle one) THIS GALAXY IS... (circle one)
Virgo A RED RECEDING
Andromeda BLUE APPROACHING
The Coma Pinwheel Galaxy RED RECEDING
Cetus A RED RECEDING
M58 Spiral Galaxy in Virgo RED RECEDING
M109 Spiral Galaxy in Ursa Major RED RECEDING
M65 Spiral Galaxy in Leo RED RECEDING

Step3: Answer conclusion questions

Question 1

The majority of these galaxies are receding, which is consistent with the expansion of the universe.

Question 2

Movement: Galaxies are moving away from each other. Size: The Universe is expanding.

Question 3

As we go further back in the past, the Universe was smaller.

Question 4

Andromeda is approaching (blue - shifted) while the other galaxies are receding (red - shifted).

Question 5

In the future, Andromeda may collide with our galaxy, which could disrupt the orbits of stars and planets.

Question 6

The red - shift of most stars' spectra indicates that they are moving away from us. This is evidence for the expansion of the universe, which is a key prediction of the Big Bang theory.

Answer:

GALAXY NAME SPECTRUM IS - SHIFTED (circle one) THIS GALAXY IS... (circle one)
Virgo A RED RECEDING
Andromeda BLUE APPROACHING
The Coma Pinwheel Galaxy RED RECEDING
Cetus A RED RECEDING
M58 Spiral Galaxy in Virgo RED RECEDING
M109 Spiral Galaxy in Ursa Major RED RECEDING
M65 Spiral Galaxy in Leo RED RECEDING
  1. The majority of these galaxies are receding.
  2. Movement: Galaxies are moving away from each other. Size: The Universe is expanding.
  3. The Universe was smaller in the past.
  4. Andromeda is approaching while the other galaxies are receding.
  5. Andromeda may collide with our galaxy, disrupting orbits.
  6. Red - shift of most stars' spectra shows they are moving away, supporting the expansion of the universe as predicted by the Big Bang theory.