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 …
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 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 …
When you observe the sky for several months, you will see that the planets evolve slowly through the stars. Former observers have noticed that in a few years, the planets …
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, …
A black hole is a very special star. It’s a dead star that has collapsed on itself and ends up measuring only a few kilometers in diameter. Its attraction is …
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