While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

The catalog of known worlds beyond our solar system has crossed another threshold. NASA’s official tally now exceeds 6,000 ...

Science fiction promises faster-than-light travel and easy journeys to other stars, but physics may have built a prison ...

On a clear night, it dominates the sky, bright enough to cast shadows and large enough for dark patches and surface features ...

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The findings surprised researchers, who used the comet's composition to better understand the environment in which it formed.

A solar storm is a sudden explosion of particles, energy, magnetic fields and material blasted into the solar system by the ...

Introduction: NASA's solar system exploration paradigm : the first fifty years and a look at the next fifty / James L. Green and Kristen J. Erickson -- Part I. Overview. Exploring the Solar System : ...

PARIS, France — An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar ...

A rare meteorite has revealed evidence of a massive lost world that once orbited the young Sun before being destroyed in a catastrophic collision. The discovery suggests some early planets formed from ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming into view, revealing hints of a surprising past – and the origin of Saturn's ...

Estimating ages of specific events is one of the most difficult problems in astrophysics. While we have a precise (and probably accurate) age for the solar system, we do not have precise ages for each ...