Comets are not the only celestial bodies with tails. Earth and Mercury also possess them, formed by different mechanisms.

A mysterious interstellar comet known as 3I/ATLAS is about to make its closest approach to Earth in December 2025. Here's ...

NASA’s TRACERS mission begins early science measurements in Earth’s southern polar cusp, tracking magnetic reconnection and ...

NASA has lost contact with its MAVEN spacecraft that has been orbiting Mars for more than a decade. Here's what we know.

A rocky exoplanet outside the Earth's solar system may have an atmosphere, according to new evidence gathered by NASA ...

Astronomers have followed 3I/ATLAS since its discovery on July 1. Hubble photographed it on July 21 from 277 million miles ...

I/ATLAS attracted attention when it was confirmed to be only the third body originating from another star system.

Astronauts aboard the ISS conduct science experiments, maintain station systems and share Earth views during Expedition 74’s first full week ...

NASA astronaut Jonny Kim returned to Earth on Tuesday (local time) alongside Roscosmos cosmonauts Sergey Ryzhikov and Alexey ...

Scientists may have discovered an atmosphere on a distant planet. Astronomers at NASA used the James Webb Space Telescope to ...

The Star of Bethlehem, a guiding light for the Magi, has long puzzled experts. NASA scientist Mark Matney proposes a 5 BC ...

NASA is closely monitoring a bus-sized asteroid, “2025 XF1,” which is rapidly approaching Earth this week. With speeds of ...