The moon is still tectonically active, like Earth, generating moonquakes just like our planet creates earthquakes, a new study based on Apollo mission data found.

Water worlds that each possess thousands of times more water than Earth does may be more common than Earth-like rocky planets in the Milky Way galaxy, a new study finds.

Most of the universe's gold, uranium and other heavy elements are generated from rapidly whirling collapsing stars, a new study finds.

Enough gold, uranium and other heavy elements about equal in mass to all of Earth's oceans likely came to the solar system from the collision of two neutron stars billions of years ago.

Upcoming gravitational-wave observatories both on Earth and in space could soon help solve some of the greatest mysteries in science.

This new model centers on newborn Earth's molten ocean.

The first meteor to hit Earth from interstellar space — and the second observed interstellar visitor overall — may have just been discovered, a new study finds.

Meteoroid impacts regularly liberate puffs of water vapor from the moon, suggesting that minuscule amounts of water may lurk just under the entire lunar surface, a new study finds.

Mice on Earth may like running in wheels, but mice in space apparently take advantage of the microgravity to run in circles by bouncing off the walls.

The secret of the project's success is linking radio dishes across the globe to create a virtual telescope about the size of Earth.

On Wednesday (April 10), the international Event Horizon Telescope project will release the first results from its plan to image black holes. But what exactly is an event horizon?

New answers for mysteries concerning Saturn's moons could shed light on whether one, Enceladus, could support life.

To see if there was a universe before the Big Bang and understand how the cosmos evolved after it began, researchers suggest looking for the influence of particles that acted like clocks.

The bizarre shapes and diverse colors seen in some of Saturn's moons may now be explained, with the help of data taken by NASA's Cassini spacecraft before it plunged to its doom.

The eccentric orbit of the Martian moon Phobos could drive the flow of powder across its surface, a new study finds, shedding light on the moon's mysterious origins.

A gigantic solar storm hit Earth about 2,600 years ago, one about 10 times stronger than any solar storm recorded in the modern day, a new study finds.

Future spaceships could use black holes as powerful launch pads to explore the stars.

Many alien planets around stars like our sun are potentially extraordinarily tilted, leading to dramatic swings between extreme winters and summers, a new study finds.

Cosmic impacts on young Mars may have triggered deluges, potentially explaining why the Red Planet was once covered in water, a new study finds.

A distant alien world that was potentially on its way into exile in interstellar space was rescued by the gravitational pull of a passing pair of stars, a new study argues.

Analyzing ripples in the fabric of space and time created by pairs of dead stars may soon solve a cosmic mystery surrounding how quickly the universe is expanding — if scientists are lucky.

Radioactive metal might help explain why Earth and its sibling worlds are not ocean planets hostile to life as we know it, a new study finds.