Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case,   A. Galaxy 1 must be twice as big as Galaxy 2.   B. we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than Galaxy 2.   C. we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2.   D. Galaxy 2 must be twice as old as Galaxy 1.

Q: the

A: The galaxy with stars bulged at the center surrounded by a disc with arms is called a spiral galaxy.…

Q: The figure below shows the spectra of two galaxies A and B.  Please can i get help  with this…

A: Dear student as per the QnA guidelines I will be answering the first 3 subparts of this problem…

Q: Why do the spiral arms of our galaxy move around the center of the galaxy? a) Spiral arms do not…

A: Normal spirals have arms that emanate from the nucleus, while barred spirals have a bright linear…

Q: Indicate whether the following statements are true or false. (Select T-True, F-False. If the first…

A:

Q: The traditional theory of the formation of our galaxy CANNOT explain   a. the existence of the disk…

A: a. The existence of the disk of the galaxy

Q: 6 light years 2.) 4.5 x 10° light years 3. 4x 10-fios light years Convert each number of kilometers…

A:

Q: What if the Andromeda galaxy were to disappear How long before we would notice?

A: About 2.5 million light-years separate our solar system from the Andromeda galaxy. If it vanished,…

Q: If we find a galaxy that is moving away at 72,000 km/s, what does Hubble’s law tells us about the…

A:

Q: Indicate whether the following statements are true or false.   (Select T-True, F-False. If the…

A: T T T F T T

Q: In the context of the Big Bang theory, cosmic inflation refers to: A. A rapid expansion of the…

A: The big bang is the focal point of the most convincing theory explaining the origin of our…

Q: The star Betelgeuse is about 197 pc away. How far is Betelgeuse in ly ? In meters? A. 642.2 ly= 2.08…

A:

Q: When we observe the most distant galaxies what are we looking at?

A: Question: When we observe the most Distant galaxies what are we looking at.

Q: If the Sun is 4.6 billion years old, how many times has it orbited the Milky Way galaxy? (The Sun is…

A: Given: Sun is 4.6 billion years old Distance from the center of Milky way, r=8300 pc Speed of Sun…

Q: If a galaxy is 9.1 Mpc away from Earth and recedes at 511 km/s, what is H0 (in km/s/Mpc)? 2. What…

A: Note: As per the policy, only the first question will be solved. If you want the solution for other…

Q: he Milky Way's

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Q: If a galaxy is 8.9 Mpc away from Earth and recedes at 497 km/s, what is H, (in km/s/Mpc)? km/s/Mpc…

A:

Q: Which of the following is an accurate statement about quasars?

A: ANS: They are abnormally massive, luminous stars at the cores of ancient galaxies.

Q: 9. I found this meme online. Its goal is to undermine the picture of the Universe proposed by modern…

A: Here are the factors that can affect in this scenario: Earth's Rotation - The Earth rotates around…

Q: Which of the following might you expect to be an additional consequence of the fact that galaxies…

A: Given Which of the following might you expect to be an additional consequence of the fact that…

Q: 6. If a spiral galaxy is 20' in diameter and you measure its distance to be 1 Mpc, what is its…

A:

Q: Describe what is meant by Olbers’ paradox. Explain how it is solved by our modern understanding of…

A: Olbers' paradox explains the dark effect of the sky. It is also known as the dark night sky paradox.…

Q: As we discussed, clouds are made of a great many small drops. Really - a great many. Imagine a…

A: As per Bartleby guideline, we will solve first three subparts.  Given that:Volume of cloud, Vcloud=1…

Q: The first stars to form in our galaxy a. had circular orbits. b. had highly elliptical…

A: Population 1 stars are the newer and younger stars.

Q: Describe the age and temperature of stars that make up spiral galaxies and their location.

A: A galaxy can be bombarded by other, smaller galaxies. Even if a galaxy is isolated, internal…

Q: Doppler-shift technology can be used to determine a star's technology has provided evidence that the…

A: Doppler shift is used to determine whether a star is moving towards us or moving away from us.

Q: If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H, (in km/s/Mpc)? | km/s/Mpc…

A: Hubble discovered that galaxies appear to move away from Earth and the velocity of recession (v) is…

Q: If the value of the Hubble constant is 70 kilometers per second per Mpc, then what is the Hubble…

A: Given information: The value of the Hubble's Constant (H0) = 70 km/s/Mpc We know that 1 Mpc =…

Q: If a galaxy is 8.8 Mpc away from Earth and recedes at 498 km/s, what is H0 (in km/s/Mpc)? _______…

A: The required value of Hubble’s constant is, The required value of Hubble time is,

Q: The matter density in the Universe today is Pm = kg m-3. What would 2.7 x 10-27 be the value of the…

A:

Q: State three pieces of evidence that support the idea that the Universe began in a hot Big Bang, and…

A: Approximately 13.7 billion years ago, all the matter and energy in the universe were created in an…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.