there’s a minimum speed a rocket needs to coast away into space: 25,020 mph (about 40,000 kilometers per hour). Scientists call that speed the escape velocity. A rocket needs to go that fast so ...

But USC's Aftershock II also reached hypersonic speeds — reaching a maximum velocity of 5,283 feet-per-second ... times the speed of sound. Now their intentionally lightweight rocket, which ...

For example, Jupiter is the most massive planet in our solar system. It’s so big, it could swallow 1,000 Earths. So it requires a very high escape speed: 133,100 mph (about 214,000 kilometers per hour ...