When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Gravity is responsible for the complexity in the universe, by creating spheres of hydrogen - where hydrogen fuses under pressure to form stars - and grouping them into galaxies. On Earth, gravity gives weight to physical objects and causes the tides.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.