Do irregular galaxies contain stars?

Do irregular galaxies contain stars?

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 are the characteristics of a irregular galaxy?

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.

How do stars move in irregular galaxies?

The stars then move on elliptical orbits around the center, but are perturbed by local irregularities. In spirals and elliptical, the potential is rather symmetric, whereas in irregulars it is quite… irregular.

What types of stars are found in irregular galaxies?

Typically, irregular galaxies have lower masses and luminosities than spiral galaxies. Irregular galaxies often appear disorganized, and many are undergoing relatively intense star formation activity. They contain both young population I stars and old population II stars.

What holds an irregular galaxy together?

The centrifugal force of the spinning gas cloud along with the gravitational pull within the clouds work together to give a galaxy its shape. All galaxies began with an elliptical shape, which is mostly a result of the centrifugal force of the spinning gas cloud.

Do irregular galaxies rotate?

Dwarf irregular galaxies can be considered extreme late-type spirals, at least as concerns the rotation curve and the associated dark matter. Many of them present well defined rotation curves that can be obtained from HI measurements.

Why are irregular galaxies irregular?

An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. Collectively they are thought to make up about a quarter of all galaxies. Some irregular galaxies were once spiral or elliptical galaxies but were deformed by an uneven external gravitational force.

What type of galaxy is a irregular?

Irregular galaxies are the most unusual of galaxies. They don’t seem to fit into either the spiral or elliptical galaxy categories. They don’t have nice spiral arms, but they do have dark patches of gas and dust.

Why aren’t stars distributed evenly throughout the globe?

Kinda the same reason as people aren’t distributed uniformly throughout the globe. People like to live with people. They are attracted to other people. They are attracted to living near friends, family, and loved ones. So they cluster into villages, towns, and cities. In the case of stars, the “attraction” comes from the force of gravity.

How do star clusters form?

In the case of stars, the “attraction” comes from the force of gravity. But it’s the same basic principle — take something uniform, let attraction happen, and the population will start to cluster. Into star clusters, galaxies, and galaxy clusters.

What would have happened if the early universe was evenly distributed?

If all of the matter in the early universe was perfectly evenly distributed, there would be no stars, there would be no planets, there would also be no “us”. When the first sub-atomic particles (neutrons, protons and electrons) appeared shortly after the Big Bang, they began to combine to form the very first matter in the Universe.

How does the expansion of the universe exaggerate the space between systems?

The expansion of the Universe exaggerates the space between these gravitationally bound systems by carrying the clusters farther and farther apart from each other. If all of the matter in the early universe was perfectly evenly distributed, there would be no stars, there would be no planets, there would also be no “us”.