As the plow pushes through a parking lot of light fluffy snow, the snow clumps together in bigger and bigger chunks. Out in space, pressure hitting a gas cloud has a similar effect, except, instead of snowballs, you get stars!
Neil deGrasse TysonCuriously, light-loving green plants reject the Sun's green light, reflecting it back at you, which is why they look green.
Neil deGrasse TysonIf you look at Einstein's equations and put in low speeds and low gravity, they become Newton's equations.
Neil deGrasse Tyson