Answer: “ Contains many young stars” .
Does an irregular galaxy have a round shape?
As their name suggests, elliptical galaxies are round or oval, with stars distributed fairly uniformly throughout. ... The stars in ellipticals tend to be older. Irregular galaxies have no identifiable shape or structure to them . They are often chaotic in appearance, without a bulge or any trace of spiral arms.
What is the irregular galaxy shape?
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. ... They are two small galaxies which orbit around our own Milky Way Galaxy.
Which phrases describe an irregular galaxy?
- contains many young stars.
- contains a lot of gas and dust.
- is smaller than other types of galaxies.
How do stars move in an irregular galaxy?
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 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.
What is the age of an irregular galaxy?
The very bright stars in the picture, those with spikes around them, are stars in the foreground belonging to the Milky Way. The main body of SagDig is rich in gas, and contains many regions of active star formation. Indeed, the average age of the stars in the galaxy is a relatively young 4 to 8 billion years .
What is the closest irregular galaxy?
The closest galaxy to the Milky Way happens to be an irregular galaxy called the Canis Major Dwarf . With just one billion stars, it appears to be a small galaxy in the process of being consumed by our own galaxy.
How do you know if you have a irregular galaxy?
An irregular galaxy is a galaxy that does not have a distinct regular shape , unlike a spiral or an elliptical galaxy. Irregular galaxies do not fall into any of the regular classes of the Hubble sequence, and they are often chaotic in appearance, with neither a nuclear bulge nor any trace of spiral arm structure.
What are the four main categories of galaxies by shape?
In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies .
Which phrase defines a galaxy?
The phrase that best defines a galaxy is “ large collection of stars, gas, and dust held together by gravity” .
Which phrase best describes a star system?
What phrase best defines a star system? ... Stars appear brighter .
How is an irregular galaxy formed?
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.
Is the Milky Way an irregular galaxy?
Our own Milky Way is a spiral galaxy, for example, and the largest galaxies in the Universe are elliptical galaxies. ... These are the irregular galaxies, and each one is unique in shape, age and structure. Irregular galaxies are often chaotic in shape, with no central bulge or spiral arms.
What are the two main types of star clusters?
Star cluster, either of two general types of stellar assemblages held together by the mutual gravitational attraction of its members, which are physically related through common origin. The two types are open (formerly called galactic) clusters and globular clusters .
What is the force that holds galaxies together?
Most 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.
