The James Webb Space Telescope's discovery of unusually bright and massive galaxies soon after the Big Bang has cast doubt on ...

The Proba-3 mission consists of two spacecraft that will fly in close formation to study the sun, with the shadow of one ...

Welsh’s ebook is called “ Space Radiation: Astrophysical origins, radiobiological effects and implications for space ...

Voyager 2's 1986 flyby of Uranus, the main source of our knowledge of the icy planet, could have come at the same time as a ...

A multi-institutional team of physicists is proposing an experiment to test whether gravity behaves as a quantum entity when ...

Since the formation of Earth approximately 4.5 billion years ago, the convection and release of hot magma in its mantle layer ...

Gravitational distortions produced by distant galaxies show a slight—but notable—disagreement with Einstein's predictions.

NASA selects two proposals for missions to observe X-ray and far-infrared wavelengths of light from space for additional ...

Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

If another gravity theory is correct, "then the broader implications are enormous," astrophysicist Stacy McGaugh told ...

By 3.6 billion years ago, Mars should have become too cold for liquid water, but something kept the rivers flowing.