An Earth-like planet orbiting an M dwarf — the most common type of star in the universe — appears to have no atmosphere at all.

Two stars in a binary system 3,000 light years from Earth are orbiting each other so closely that one of the stars has burnt out.

Water is essential for life on Earth and other planets, and scientists have found ample evidence of water in Mars’ early history.

Right above you is the sky – or as scientists would call it, the atmosphere. It extends about 20 miles (32 kilometers) above the Earth.

Standard cosmological models tell us that the universe – space, time and mass/energy – exploded into existence some 14 billion years ago.

A new study suggests that many more planets may have large amounts of water than previously thought—as much as half water and half rock.

Swirling around the planet’s equator, the rings of Saturn are a dead giveaway that the planet is spinning at a tilt.

UC Riverside physicist and colleague invoke the cosmological collider to explain why matter, and not antimatter, dominates the universe

If you could keep going out, as far as you wanted, would you just keep passing by galaxies forever? Are there an infinite number of galaxies

Researchers at SLAC found that oxygen boosts this exotic precipitation, revealing a new path to make nanodiamonds here on Earth.

A new citizen science project allows volunteers to play an important role in helping scientists learn more about the atmosphere on Jupiter.

Our universe could be the mirror image of an antimatter universe extending backwards in time before the Big Bang.

The exoplanet is orbiting one of two small stars in a binary system located in the Draco constellation about 100 light-years from Earth.

Scientists relied on the holographic principle, which suggests that the two existing theories – particles and gravity – are equivalent.

Groundbreaking observation from Gemini Observatory suggests this and possibly other colossal stars are less massive than previously thought.

Scientists use modern rocks, moon samples and meteorites to figure out when and how the Earth and moon formed and what they had looked like.

In the last 25 years, astronomers have found thousands of exoplanets around stars in our galaxy, but more than 99% of them orbit small stars

Some cosmological models propose that the universe expands and contracts in infinite cycles, but new research finds a crucial flaw

Northwestern University launched STARFORGE, a project that produces the most realistic, highest-resolution 3D simulations of star formations

In the vicinity of black holes, space is so warped that even light rays may curve around them several times.