We must try to understand that the universe is something really gigantic, bigger than anything you can imagine! Even researchers who study this subject every day have trouble understanding what…
The Quasar
Visually, the quasars look like bluish stars a little blurry but unlike the stars, they are among the farthest objects in the universe. These are galaxies whose nucleus emits a…
Collisions Between Galaxies
As the galaxies get closer to each other, they can collide. But as you can see by observing the stars near the Sun and the other galaxies with the telescope,…
Clusters of Galaxies
Galaxies contain tens or hundreds of billions of stars like the Sun and all this mass attracts nearby galaxies. They gather in general to form clusters of galaxies and sometimes…
Deep in the Cosmos
Our galaxy, the Milky Way, is isolated in space but it is not alone. The galaxy closest to us is Andromeda, M31. It is 2.5 million light-years away, which is…
The Death of a Star
When a star becomes a white or red dwarf, its size is no greater than that of the Earth and it shines a little just before dying. It then dies…
The Birth of a Star
The Sun as well as all the stars that you see in the sky are born in a huge cloud of gas and dust whose center denser and hot has…