Consider the following hypothetical observations, some of which are real and some of which are fictional. For each observation, your job is to answer this question: If the observation were real, would it provide evidence for or against the idea that the universe is expanding? Sort each observation into the appropriate bin as follows:
A) Place an observation in the "Supports the expanding universe" bin if it would provide evidence that the universe is expanding.
B) Place an observation in the "Contradicts the expanding universe" bin if it would provide evidence that would force us to reconsider the idea of an expanding universe.
C) Place an observation in the "Neither supports nor contradicts" bin if it does not allow us to distinguish between a universe that is expanding and a universe that is not expanding.

The universe is expanding and has been continuously expanding since its formation billions of years ago. Because the universe does not have a center, everything is moving away from everything else through space.

Some of the statements in this question prove this while others contradict the observation of our universe expanding.

However, the Andromeda galaxy moving towards us neither supports nor contradicts this observation. The Andromeda galaxy is in our local group, a group bound together by gravitational force.

Supports the expanding universe

B) All galaxies in the Coma Cluster of galaxies have reshifted spectra

E) The measured rate of expansion is the same in all directions

F) Galaxies 200 million light-years away move away from us twice as fast as galaxies 100 million light-years away

Contradicts the expanding universe

A) Irregular galaxies outside the Local Group are moving towards us.

C) Galaxy speeds are faster in Summer than in Winter

G) Spiral Galaxies move away from us 10% faster than elliptical galaxies at the same distances

Neither supports nor contradicts

D) The Andromeda Galaxy, a member of our Local Group, is moving towards us

Parrain Parrain · Answer 2 · 2022-04-05T15:00:50+02:00

Based on the implication of the observation, the appropriate bins will be:

Supports the expanding universe

All galaxies in the Coma Cluster of galaxies have redshifted spectra.
The measured rate of expansion is the same in all directions.
Galaxies 200 million light-years away move away from us twice as fast as galaxies 100 million light-years away.

Contradicts the expanding universe:

Irregular galaxies outside the Local Group are moving towards us.
Galaxy speeds are faster in Summer than in Winter.
Spiral Galaxies move away from us 10% faster than elliptical galaxies at the same distances.

Neither supports nor contradicts

The Andromeda Galaxy, a member of our Local Group, is moving towards us.

Is the universe expanding?

The universe can be said to be expanding based on evidence such as galaxies having redshifted spectra which indicate that they are moving positions.

There is also a uniform rate of expansion and galaxies further away move at faster speeds.

There have been some observations that go against belief that the universe is expanding including the fact that irregular galaxies outside the Local group that the Milky Way is in, are moving towards it.

Then there is evidence that neither supports nor contradicts the belief that the universe is expanding such as the Andromeda galaxy moving towards us.

Find out more on the belief that the universe is expanding at https://brainly.com/question/1191198.