Total solar eclipses are not just incredible celestial events. They are also important scientific moments that allow ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

China lays foundation for cislunar infrastructure with spacecraft in novel lunar orbits China has sent several small ...

Despite the offset sunrise and sunset times, the summer solstice is still the longest day of the year in terms of total ...

NASA’s James Webb Space Telescope has spotted an “abnormal, chaotic, and strange" planetary system 60 light-years from Earth.

Spacecraft that orbit around Earth do so in two types of orbits: circular and elliptical. In a circular orbit, the spacecraft is always at the same distance from the center of the Earth.