Avi Loeb's controversial claim that a recent fireball resulted from an interstellar object is taking a hammering.

Picture in your mind a big parking lot with 131 million cars on it. Now imagine that they are spread out over the entire Earth’s inhabited areas. Although still a large number, it is ...

An object moving in a circular orbit at a constant speed has a changing velocity. This is because velocity is a vector quantity that depends on speed and direction. The object in orbit is ...

the orbital velocity on approach needs to be quite close to Jupiter’s. The reason we can put missions into orbit around Mars and Venus, or even land on their surfaces, relatively quickly ...

Due to the moon's velocity, the Earth keeps pulling the moon towards it without the moon actually getting closer to the Earth. This is similar to how satellites orbit the Earth. More for You ...