Inscrivez-vous ou connectez-vous pour rejoindre votre communauté professionnelle.
A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars.
I agree with a simple answer given by Mr Hatim, details are easily available on the internet...
Avez-vous besoin d'aide pour créer un CV ayant les mots-clés recherchés par les employeurs?