We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

The planets in order from the Sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. If you include the ...

When NASA's DART mission crashed into the asteroid Dimorphos, the first stage of the impact saw the spacecraft's solar panels ...

In the almost three years since NASA proved that it could successfully deflect an asteroid, we’ve learned a lot about these ...

However, new research has shown this potentially "water ice-rich" visitor could be even more extraordinary than initially ...

While Asteroid 2024 YRA has a minute chance of hitting Earth in seven years, the co-lead of NASA's DART mission says a small spacecraft could deflect the space rock's course.

Ever been late because you misread a clock? Sometimes, the "clocks" geologists use to date events can also be misread.

Asteroid 2024 YR4 has a 0.0017% chance of hitting Earth, but media reports too often ignore the unlikelihood of impact in reports of near-Earth asteroids, a Tucson astronomer says.