While Earth's slowdown is not noticeable on human timescales, it's enough to work significant changes over eons. One of those ...

In equatorial orbit, the motion of the Earth’s spin helps you along. Therefore, satellites are generally hurled into space eastward to take advantage of Earth’s rotation. “In short ...

The 24-hour day we’re used to might not stay the same forever. Scientists say Earth’s rotation is gradually slowing down ...

Maintaining the fuel at temperatures below –183°C is key: even small heat leaks in space can cause gases to boil off.

Planetary alignments have always been a fascinating subject, both for scientists and astrology enthusiasts alike. The idea that planets aligning in a straight line could have any sort of impact on ...

However, instead of flying in the direction of the Earth's rotation to gain more momentum ... For one thing, a polar orbit requires more fuel than an equatorial one. In addition, the Earth's ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.