A comet's tail always points away from the sun.
2
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Earth is the only planet in our solar system that's not named after a god or goddess.
17
When a massive power outage struck southern California in the 1990s, Los Angeles residents reportedly called 911 to express alarm about strange clouds hovering overhead; they were seeing the Milky Way for the first time.
31
Sound doesn't travel in space.
255
It would take more than 150 years to drive a car to the sun.
569
Summer on Uranus lasts for 21 years.
358