Add Yahoo as a preferred source to see more of our stories on Google. A fireball meteor exploded with the force of 250 tons of TNT over Northeast Ohio on Tuesday, March 17, and was visible from as far ...

For more than 60 years, nearly every large rocket used some combination of the same liquid and solid propellants. Refined kerosene was favored for its easy handling and non-toxicity, hydrazine for its ...

Last week, NASA announced that the Hubble Space Telescope had spied a truly one-in-a-billion event: an asteroid creating a jet stream of compressed gases that acts as a sort of na ...