What is the cause of the irregular distribution of galaxies in the universe?

History and formation. Because elliptical galaxies contain older stars and less gas, scientists think that they are nearing the end of the evolutionary line for galaxies. When two spirals collide, they lose their familiar shape, morphing into the less-structured elliptical galaxies.

How are irregular galaxy created?

Irregular galaxies often form when one galaxy collides with another. Here, a smaller galaxy passed through the middle of a large spiral galaxy, forming this irregular Cartwheel Galaxy.

How did galaxies form in the early universe?

Galaxies are thought to begin as small clouds of stars and dust swirling through space. As other clouds get close, gravity sends these objects careening into one another and knits them into larger spinning packs.

How were galaxies different in the very early universe?

Galaxies in the early universe were far more active on average than our Milky Way. We group most massive galaxies (roughly the size of the Milky Way or larger) in the nearby universe into two general classes: “late-type” spirals (like our galaxy and M31) and “early-type” ellipticals (like M87).

Why are irregular galaxies blue?

This irregular galaxy is also a neighbor of our own galaxy, at a distance of only about 10 million light years. The blue regions in the image are clusters of young stars. The brighter stars are in the foreground, much closer to us than Sextans A. They are members of our own Milky Way galaxy.

Why are irregular galaxies irregular?

An irregular galaxy is the catchall name given to any galaxy that does not neatly fit into one of the categories of the Hubble classification scheme. They have no defined shape nor structure and may have formed from collisions, close encounters with other galaxies or violent internal activity.

What are irregular galaxies full of?

Irregular galaxies have no particular shape. They are among the smallest galaxies and are full of gas and dust. Having a lot of gas and dust means that these galaxies have a lot of star formation going on within them.

What caused the galaxies to form?

One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. The other, which has gained strength in recent years, says the young universe contained many small “lumps” of matter, which clumped together to form galaxies.

Why do galaxies form disks?

Galaxies are disc shaped because they are gas rich and dynamically young. Stars are also gas rich but they are dynamically old so they have had time to rid themselves of their discs. Young protostars (which are dynamically young) are surrounded by proto-stellar discs.

Why can we see the early universe?

The early universe was very dense, and very hot, what with things being crammed together. Hot things make lots of light, and the early universe was extremely hot everywhere, so there would have been plenty of light everywhere, shooting in every direction.

What did the early universe look like why?

The Early Universe After the Big Bang, the universe was like a hot soup of particles (i.e. protons, neutrons, and electrons). Exactly what the universe’s first light (ie. stars that fused the existing hydrogen atoms into more helium) looked like, and exactly when these first stars formed is not known.