Question: Is The Local Group A Cluster?

What are the 4 types of galaxy?

There are four main categories of galaxies: elliptical, spiral, barred spiral, and irregular.

These types of galaxies are further divided into subcategories while at the same time other types of galaxies exist based on their size and other unique features..

How far away is the Virgo cluster?

65.23 million light yearsVirgo Cluster/Distance to Earth

What is the biggest galaxy known to man?

IC 1101It’s difficult to characterize what the largest galaxies are, because they don’t really have precise boundaries, but the largest galaxies we know of are millions of light-years across. The biggest known galaxy is IC 1101, which is 50 times the Milky Way’s size and about 2,000 times more massive.

How big across is the local universe?

The Local Group is the galaxy group that includes the Milky Way. It has a total diameter of roughly 3 megaparsecs (9.8 Mly), and a total mass of the order of 2×1012 solar masses (4.0×1042 kg).

What is meant by dark matter?

Dark matter is composed of particles that do not absorb, reflect, or emit light, so they cannot be detected by observing electromagnetic radiation. Dark matter is material that cannot be seen directly. We know that dark matter exists because of the effect it has on objects that we can observe directly.

How big is the local cluster?

5 million light yearsLocal Group/Radius

What galaxies are in the local group?

The Milky Way galaxy is one of more than 54 galaxies known as the Local Group. The three largest members of the group are our Milky Way (second-biggest), the Andromeda galaxy (biggest) and the Triangulum Galaxy.

Is the local group a rich cluster?

Clusters can be rich, with several thousand galaxies, or poor, with only 20 or 30 members. The Local Group, the cluster to which our own Milky Way galaxy belongs, is made up of about 30 galaxies. … The richest nearby cluster is Virgo, 60 million light years from the Milky Way.

How many galaxies are there in a local cluster?

30 galaxiesThere are over 30 galaxies that are considered to be in the local group, and they are spread over a diameter of nearly 10 million light years, with the center of them being somewhere between the Milky Way and M31. M31 and the Milky Way are the most massive members of the Local Group, with M33 being the 3rd largest.

What is the force that holds galaxies together?

gravityMost galaxies are not alone in the vast expanse of space, but are connected to one or more other galaxies by gravity. The same force that holds you onto the Earth can keep many individual galaxies bound together.

How big is a cluster of galaxies?

A galaxy cluster, or cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity with typical masses ranging from 1014–1015 solar masses.

What is the largest type of galaxy?

IC 1101 is a supergiant elliptical galaxy at the center of the Abell 2029 galaxy cluster and is one of the largest known galaxies. Its halo extends about 600 kiloparsecs (2 million light-years) from its core, and it has a mass of about 100 trillion stars.

What is considered a small galaxy?

Elliptical galaxies may also be small, in which case they are called dwarf elliptical galaxies. … They’re called “lenticular” because they resemble lenses: Like spiral galaxies, they have a thin, rotating disk of stars and a central bulge, but they don’t have spiral arms.

Can humans leave the local group?

Most, yes, but certainly not the ones in the local group and some others outside it. Other galaxies aren’t moving away from us. Space itself is expanding, causing galaxies to become further apart from eachother. … We can absolutely leave the galaxy, and not just with a generational ship, but in a single human lifetime.

How many galaxies are in a Virgo cluster?

2000 galaxiesThe Virgo cluster is a massive cluster of galaxies which dominates the Virgo supercluster. There are roughly 2000 galaxies in this cluster (although ninety percent of them are dwarf galaxies).

What is our galaxy called?

Milky Way GalaxyThe Milky Way is a large barred spiral galaxy. All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area.

What is considered the local group?

The Local Group (also called M31 group or the Andromeda group) is the group of galaxies that includes our galaxy, the Milky Way. The group comprises over 30 galaxies, with its gravitational center located somewhere between the Milky Way and the Andromeda Galaxy.

Is the local group in the Virgo cluster?

The Virgo Supercluster (Virgo SC) or the Local Supercluster (LSC or LS) is a mass concentration of galaxies containing the Virgo Cluster and Local Group, which in turn contains the Milky Way and Andromeda galaxies.

What is the most common type of galaxy in the local group?

Spiral galaxiesSpiral galaxies are the most common type in the universe. Our Milky Way is a spiral, as is the rather close-by Andromeda Galaxy.

How many galaxies are there?

200 billion galaxiesThe landmark Hubble Deep Field, taken in the mid-1990s, gave the first real insight into the universe’s galaxy population. Subsequent sensitive observations such as Hubble’s Ultra Deep Field revealed a myriad of faint galaxies. This led to an estimate that the observable universe contained about 200 billion galaxies.

Where does Earth sit in our galaxy?

Orion ArmEarth is located in one of the spiral arms of the Milky Way (called the Orion Arm) which lies about two-thirds of the way out from the center of the Galaxy. Here we are part of the Solar System – a group of eight planets, as well as numerous comets and asteroids and dwarf planets which orbit the Sun.