Earth, like most planets out in the cosmos, famously spins on an axis, but what if it didn’t? What if one day, instead of twirling at 1,040 Miles per hour it just suddenly stopped, coming to a ...

Could the Sun Fry Earth with a Superflare? Stars like the sun might erupt with extreme explosions about once per century By Phil Plait edited by Lee Billings ...

The sun and Earth will have a special interaction this week. Here's why it matters.

Earth 1, asteroids 0: The next generation of planetary defense takes shape at JPL The NEO (Near-Earth Object) Surveyor undergoes adjustments at Jet Propulsion Laboratory in Pasadena.

The Solar Orbiter has captured humanity's first look at the south pole of the sun, revealing messy magnetic fields and particles being ejected at high speeds.

A swarm of large asteroids likely lurking around Venus could one day pose an "invisible threat" to Earth if left unchecked, astronomers have warned.

NASA's PUNCH sun-studying mission has seen first light — and the team says all four instruments are indeed working as expected.

If President Trump makes good on all his threats, Harvard may lose much of its influence and prestige. It could also become even harder to afford.

A Soviet spacecraft launched a half-century ago called Kosmos 482 has been orbiting the Earth for decades and is at last expected to reenter Earth's atmosphere this coming weekend.

Kosmos-482, a spacecraft bound for Venus in 1972, was a time capsule from the Cold War when superpowers had broad ambitions for exploring the solar system.