Asked by: Valme Tikhonov
science space and astronomy

Are there more spiral or elliptical galaxies?

Astronomers have identified more spiral galaxies than ellipticals, but that's simply because the spirals are easier to spot. Spiral galaxies are hotbeds of star formation, but elliptical galaxies aren't nearly as prolific because they contain less gas and dust, which means fewer new (and brighter) stars are born.

In this way, what percent of galaxies are elliptical?

The Milky Way, the galaxy where our solar system is located, is an Sb-type spiral galaxy. An estimated 20 percent of known galaxies have a lenticular form, 15 percent are elliptical and only about 5 percent are irregular.

Secondly, where are elliptical galaxies most likely to be found? Elliptical galaxies are preferentially found in galaxy clusters and in compact groups of galaxies. Unlike flat spiral galaxies with organization and structure, elliptical galaxies are more three-dimensional, without much structure, and their stars are in somewhat random orbits around the center.

Also know, why are elliptical galaxies most common?

One of the most common types are elliptical galaxies, named because they have an ellipsoidal (or egg) shape, and a smooth, almost featureless appearance. They're the result of many collisions between smaller galaxies, and all these collisions have destroyed the delicate spiral structure that we see in our own galaxy.

Is our galaxy spiral elliptical or irregular?

A spiral galaxy consists of a spinning, flattened disk with arms that rotates very fast. An elliptical galaxy is the most common type of galaxy, has a roundish shape, and demonstrates little or no star formation. An irregular galaxy is a galaxy with no defined shape that has very young stars.

Related Question Answers

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Is the universe a spiral?

The Milky Way – the galaxy that includes Earth and our solar system – is an example of a spiral galaxy. Spiral galaxies make up roughly 72 percent of the galaxies that scientists have observed, according to a 2010 Hubble Space Telescope survey.

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Is the Milky Way an elliptical galaxy?

Edwin Hubble studied galaxies and classified them into various types of elliptical and spiral galaxies. It stood to reason that because the Milky Way was disk-shaped and because spiral galaxies were disk-shaped, the Milky Way was probably a spiral galaxy.

Khalida Kokalari


Is the universe elliptical?

What Are Elliptical Galaxies? Elliptical galaxies are the most abundant type of galaxies found in the universe but because of their age and dim qualities, they're frequently outshone by younger, brighter collections of stars. Elliptical galaxies lack the swirling arms of their more well-known siblings, spiral galaxies.

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What is an elliptical galaxy made of?

Elliptical galaxies are shaped like ellipses (stretched circles). They are divided into eight types: E0-E7 depending on how elliptical they are. E0 ellipticals are nearly circular, while E7s are very stretched out. Elliptical galaxies are made up of mostly old stars, and do not have much gas and dust.

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How big is the average galaxy?

52,850 light years

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How big is a spiral galaxy?

Spiral galaxies come in a wide range of sizes, from 5 to 100 kiloparsecs across, have masses between 109 and 1012 solar masses, and luminosities ranging from 108 to 1011 time that of the Sun.

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Where is Earth in the universe?

Well, Earth is located in the universe in the Virgo Supercluster of galaxies. A supercluster is a group of galaxies held together by gravity. Within this supercluster we are in a smaller group of galaxies called the Local Group. Earth is in the second largest galaxy of the Local Group - a galaxy called the Milky Way.

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What will happen to our galaxy in 4 billion years?

The Andromeda–Milky Way collision is a galactic collision predicted to occur in about 4.5 billion years between two galaxies in the Local Group—the Milky Way (which contains the Solar System and Earth) and the Andromeda Galaxy. Some stars will be ejected from the resulting galaxy, nicknamed Milkomeda or Milkdromeda.

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Do elliptical galaxies spin?

Unlike spiral galaxies, elliptical galaxies are not supported by rotation. The orbits of the constituent stars are random and often very elongated, leading to a shape for the galaxy determined by the speed of the stars in each direction.

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How old is the universe?

13.772 billion years

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What does a spiral galaxy look like?

Most spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge. The spiral arms are sites of ongoing star formation and are brighter than the surrounding disc because of the young, hot OB stars that inhabit them.

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What is a galaxy made of?

Many of those points of light are actually galaxies — collections of millions to trillions of stars. Galaxies are composed of stars, dust and dark matter, all held together by gravity. Astronomers aren't certain exactly how galaxies formed. After the Big Bang, space was made up almost entirely of hydrogen and helium.

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What is our galaxy?

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. Some scientists think there could be as many as one hundred billion galaxies in the universe.

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Do elliptical galaxies have a lot of dust?

Elliptical galaxies contain primarily old stars, and do not have much gas and dust. There is very little new star formation in these galaxies. Irregular galaxies have no particular shape. They are among the smallest galaxies and they contain a vast amount of gas and dust.

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Why are galaxies flat and not spherical?

Question: Why do stars and planets appear spherical when galaxies are flat? Answer: Galaxies aren't completely flat. At the centre of every galaxy is a black hole, which is very dense matter that pulls everything towards it. That black hole is moving through space and spinning very fast.

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How far apart are stars in a globular cluster?

The typical distance between stars in a globular cluster is about 1 light year, but at its core, the separation is comparable to the size of the Solar System (100 to 1000 times closer than stars near the Solar System). Globular clusters are not thought to be favorable locations for the survival of planetary systems.