Is the Milky Way the only galaxy in the universe?

It wasn’t until the 1920s when it was confirmed that many of these nebulous stars were in fact completely different galaxies, whole other sets of billions of stars like the Milky Way, far beyond our own. We now know the Milky Way is but one of the billions of galaxies in the universe.

What is the difference between galaxy Universe and Milky Way?

Galaxies come in many sizes. The Milky Way is big, but some galaxies, like our Andromeda Galaxy neighbor, are much larger. The universe is all of the galaxies – billions of them! Our Milky Way Galaxy is one among the billions of galaxies in our Universe.

Where is the Milky Way in the universe?

The Milky Way galaxy is found in a small group of galaxies (known as the Local Group) towards the edge of a relatively small supercluster which we call the Local Supercluster (or sometimes the Virgo Supercluster after the Virgo Cluster, the largest cluster of galaxies in it).

How do galaxies collide if the universe is expanding?

Dr. Kaku: Yes, the universe is expanding but it is still possible that galaxies collide. This is because galaxies which are very close together attract each other gravitationally, counteracting the repulsive force of the expanding universe. This is the force which is pushing the galaxies apart.

When galaxies collide what happens in general to the nebulae of gas and dust contained within them?

When galaxies collide, what happens in general to the nebulae of gas and dust contained within them? Many of them collide head-on with nebulae in the other galaxy, causing large-scale star formation.

What is the biggest universe or galaxy?

From largest to smallest they are: Universe, galaxy, solar system, star, planet, moon and asteroid.

Which best describes our view of the galaxy in visible light?

Our view of the galaxy in visible light is mostly obscured by the interstellar medium. [All of the choices presented are TRUE.] The Milky Way is one of the largest galaxies in our Local Group. Most of the stars in its halo are confined to globular clusters.

Why do elliptical galaxies appear reddish in color?

Select all that apply. The average elliptical galaxy appears reddish or orange because they are sites of intense ionization nebulae (hot hydrogen gas). In general, elliptical galaxies contain very little cool gas. Small elliptical galaxies are the most common kind of galaxy today.

What are 5 facts about the formation of galaxies?

5) The orderly orbits of planets arose from their formation in a rotating gas cloud. 6) The Andromeda and Milky Way Galaxies formed in the same way. 7) More distant galaxies are moving away from us faster than nearby galaxies. 8) Stars shine with energy generated by nuclear fusion in their cores.

How many stars are there in the Milky Way galaxy?

[All of the choices presented are TRUE.] The Milky Way is one of the largest galaxies in our Local Group. Most of the stars in its halo are confined to globular clusters. It is a spiral galaxy with over 100 billion stars. Which of the following statements is/are correct about individual stars in the HALO of the Milky Way Galaxy?