Gravity is one of the basic forces in the Universe, like electromagnetism. It makes things with mass pull towards each other. More massive objects, such as the Earth, pull smaller objects, such as you, towards them until they stick together.
Is it true? An apple taught us about gravity.
Maybe. According to legend, super-scientist Isaac Newton first realized how gravity works over 330 years ago, after gravity pulled an apple from a tree he was sitting under, and it landed on his head!
Is the Universe expanding evenly?
No – the force of gravity stops everything from flying outwards. Lumpy bits of space become even lumpier, moving at different speeds. Gravity locks together little pockets of space and matter, such as galaxies.
Amazing! There are walls in space! Galaxies aren’t evenly spaced through the Universe. They are arranged more like walls around emptier regions of space. One wall has already been measured – it’s about a billion light years across!
What is the Great Attractor?
It’s a strange little knot in space that has the pulling power of 50 million billion Suns, but is not a black hole.
Picture Credit : Google