What is the evidence for an accelerating universe quizlet?

What is the evidence for an accelerating universe quizlet?

The major evidence for the idea that the expansion of the universe is accelerating comes from observations of: white dwarf supernovae. Which of these possible types of universe would not expand forever? Spiral galaxy rotation curves are generally fairly flat out to large distances.

Why is the acceleration model of the universe the most realistic model?

The accelerating model is most strongly supported because the data points lie closest to this curve. The data shown on the graph are real, so you can now see why astronomers have come to the conclusion that we very likely live in a universe in which the expansion rate has been accelerating with time.

What observations provide evidence for dark energy quizlet?

observations suggesting that the expansion of the universe is accelerating. Strong evidence for the existence of dark matter comes from observations of: clusters of galaxies. A photograph of a cluster of galaxies shows distorted images of galaxies that lie behind it at greater distances.

Is space expanding within clusters of galaxies Why or why not?

Is space expanding within clusters of galaxies? No, because their gravity is strong enough to hold them together even while the universe as a whole expands.

Is space still expanding?

Based on large quantities of experimental observation and theoretical work, the scientific consensus is that space itself is expanding, and that it expanded very rapidly within the first fraction of a second after the Big Bang. This kind of expansion is known as “metric expansion”.

Is the Milky Way expanding or contracting?

The Milky Way, the galaxy which contains our own solar system, is expanding and will eventually grow into its neighbour, Andromeda. Already 100,000 light years in diameter, new research puts its rate of growth at about 500 metres per second.

How fast is the Milky Way galaxy expanding?

This means that for every megaparsec — 3.3 million light years, or 3 billion trillion kilometers — from Earth, the universe is expanding an extra 73.3 ±2.5 kilometers per second. The average from the three other techniques is 73.5 ±1.4 km/sec/Mpc.

Why is the Milky Way not expanding?

The Milky Way and all the local group galaxies will stay bound together, eventually merging together under their own gravity. Earth will revolve around the Sun at the same orbital distance, Earth itself will remain the same size, and the atoms making up everything on it will not expand.

What will happen when the Andromeda and Milky Way galaxies collide?

The result of the collision between Andromeda and the Milky Way will be a new, larger galaxy, but rather than being a spiral like its forebears, this new system ends up as a giant elliptical. Interaction with their surroundings means that the pair will spiral inwards, emitting gravitational waves as they do so.

Is space expanding faster than light?

But no object is actually moving through the Universe faster than the speed of light. The Universe is expanding, but the expansion doesn’t have a speed; it has a speed-per-unit-distance, which is equivalent to a frequency, or an inverse time.

Why will we collide with Andromeda?

Across the universe, galaxies are colliding with each other. That’s because stars inside galaxies are separated by such great distances. Thus the stars themselves typically don’t collide when galaxies merge. That said, the stars in both the Andromeda galaxy and our Milky Way will be affected by the merger.

How fast is Andromeda moving towards us?

The Andromeda Galaxy (M31) is indeed approaching us, by about 300 kilometers (190 miles) per second measured with respect to the Sun.

What will it look like when Andromeda collides?

The galaxy product of the collision has been nicknamed Milkomeda or Milkdromeda. According to simulations, this object will look like a giant elliptical galaxy, but with a centre showing less stellar density than current elliptical galaxies.

What is responsible for holding together each galaxy?

What holds galaxies together? Gravity. All of the stars of a galaxy are all attracted to each other. This attraction is weak because the stars are very far apart, but it is enough to keep the galaxies together.

Can we see Andromeda galaxy from India?

Answer: Yes, you can see a few other galaxies without using a telescope! The nearby Andromeda Galaxy, also called M31, is bright enough to be seen by the naked eye on dark, moonless nights. The Andromeda Galaxy is the only other (besides the Milky Way) spiral galaxy we can see with the naked eye.

What is the best time to see the Milky Way?

Generally speaking, the best time to see the Milky Way is during the Milky Way season, which goes from February to October, usually between 00:00 and 5:00, and on nights with a new moon. This, however, will vary depending on the hemisphere, your latitude, and other factors like the moon phase.

How many light years away is Andromeda?

2.537 million light years

Which is bigger Milky Way or Andromeda?

The reason the collision is happening a few billion years ahead of schedule is that the Andromeda Galaxy is much bigger than it appears. The galaxy’s bright, starry disk is about 120,000 light years in diameter, making it slightly larger than the Milky Way.

Is Andromeda galaxy visible from Earth?

With an apparent magnitude of 3.4, the Andromeda Galaxy is among the brightest of the Messier objects, making it visible to the naked eye from Earth on moonless nights, even when viewed from areas with moderate light pollution.

Can you see the past from space?

The time it takes for light from objects in space to reach Earth means that when we look at planets, stars and galaxies, we’re actually peering back in time. When we look up at the stars, we are looking back in time. Every time we look at something ‘up there’ we’re seeing it as it was in the past.

Is it possible to see what a star looked like 10 years in the past?

Because of the finite speed of light, when you gaze up into the night sky, you are looking into the past. The bright star Sirius is 8.6 light years away. That means the light hitting your eye tonight has been traveling for 8.6 years. When you look at that star tonight, you see it as it was at the time of your birth.

How far can we see into the past?

Today, the most distant objects we can see are more than 30 billion light-years away, despite the fact that only 13.8 billion years have passed since the Big Bang. The farther a galaxy is, the faster it expands away from us and the more its light appears…

Can you see stars in space?

Of course we can see stars in space. We see stars more clearly from space than we do from Earth, which is why space telescopes are so useful. Even in space the stars aren’t overly bright, and our eyes can lose dark adaption pretty quickly. NASA An image from the ISS of stars and glowing layers of Earth’s atmosphere.

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