Researchers have proposed a theoretical timepiece, dubbed the "CRASH Clock," which tells us how quickly satellites would start colliding if they lost the ability to avoid each other, such as during a ...

Exoplanets like Earth have been discovered but not all Earth-like planets are equal when it comes to alien life.

On Monday, SpaceX made space history, as four astronauts were launched into a pole-to-pole orbit not traveled by any human before them. But why is this orbit so unusual, and why has nobody done it ...

In a blow to anyone dreaming that complex life may exist elsewhere in the universe, a new study suggests we're unlikely to ...

Kosmos 482 is 3.2 feet across and could make impact at about 150 mph, per one expert Toria Sheffield joined the PEOPLE editorial staff in 2024. Her work as a writer/editor has previously appeared in ...

A NASA mission has spotted an Earth-size exoplanet orbiting a small star about 100 light-years away. The planet, named TOI 700 e, is likely rocky and 95% the size of our world. The celestial body is ...

Researchers believe the “quasi-satellite” has accompanied Earth since 1957.

Earth will have a visitor within its orbit for the next several decades, according to astronomers. An asteroid named 2025 PN7 has become a "quasi-moon" to Earth, as it will be sharing an orbit with ...

In the bigger picture, "down" could be defined as being below the plane of the solar system, which is known as the ecliptic.

Our world could still be rocked indirectly. “City-killer” asteroid 2024 YR4 may no longer be on a collision course with Earth, but it could pose a threat to our planet. Astronomers have upped the odds ...

Earth-orbiting satellites could begin colliding with one another in less than three days in a worst-case-scenario scenario — potentially triggering a runaway cascade that may render low Earth orbit ...