starchild.gsfc.nasa.gov

GAvb7 TIL the sun is not on fire. It produces heat and light through nuclear fusion rather than burning matter using oxygen.
x6K75 TIL : The planet Uranus used to be called George
LkZVv TIL that in 3000 BC the North Star was not Polaris, but a star called Thuban, because the axis of the earth was pointed in a different direction back then. This is because of the precession of equinoxes speeding and slowing down of the earth's spin through imperceptible intervals.