Did You Know?
Some stars are cool enough to touch.
Brown dwarfs, failed stars that never got massive enough to sustain nuclear fusion, can have surface temperatures as low as 80°F (27°C). One such star, WISE 1828+2650, is actually cooler than the human body. These objects bridge the gap between stars and planets.
Did You Know?
A day on Mercury is twice as long as its year.
Due to Mercury's slow rotation and fast orbit, it takes 176 Earth days for the Sun to move...
Did You Know?
The largest storm ever observed was bigger than Earth itself.
The Great Dark Spot on Neptune, observed by Voyager 2 in 1989, was large enough to contain the...
Did You Know?
Europa shoots water into space from 125-mile-high geysers.
Jupiter's moon Europa has massive water plumes that shoot from cracks in its icy surface. These geysers are...