A new theory for how rocky planets form could explain the origin of so-called "super-Earths"—a class of Earth-like exoplanets.

Above the atmosphere is space. It’s called that because it has far fewer molecules, with lots of empty space between them.

Astrophysicists say that there is a clear, unambiguous signal in the cosmos which could eliminate inflation as a possibility.

For the first time, astronomers have spotted an exoplanet whose orbit is decaying around an evolved, or older, host star.

An Earth-like planet orbiting an M dwarf star discovery could cause a major shift in the search for life on other planets.

New measurements show that the light emitted by stars outside our galaxy is two to three times brighter than the light from known galaxies.

Dark matter could be made up of ultralight dark photons that heated up our universe: this is a new scenario proposed in a recent study.

A new map of the universe displays for the first time the span of the entire known cosmos with pinpoint accuracy and sweeping beauty.

Astrophysicists say that there is a clear, unambiguous signal in the cosmos which could eliminate inflation as a possibility.

The black hole’s gravity, which exists in three dimensions, mathematically connects to the particles dancing above it, which exist in 2D.

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

An unrecognized effect boosts or diminishes the Pacific cold tongue, likely impacting El Niño/La Niña events and North American weather

Have you ever wondered what it would be like to travel to outer space – and then keep going? What would you find?

Provides insight into the formation and evolution of asteroids, icy moons and Earth-like rocky planets in the early history of the universe.

The signal – known as the cosmic graviton background (CGB) – can be detected, although it will be a massive technical challenge.

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.

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.

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