6. What do you mean with "gravity lessens"?
As I understand, gravity is not that everything is pulled towards planets and stars, but gravity pushes everything together. would not the pressure/gravity be less if the universe expanded.
Hi i have a few questions about black holes.
Are black holes just stars that are so big, and have so much mass that no light can escape them?
Do black grow in size, or are they just an infinite small point of space?¨
Can black holes die?
are they actual holes, or are they spherical?
can you...