Rather than slowly condensing over millions of years, the first building blocks of Earth and other planets may have formed ...

Interstellar comet 3I/ATLAS showed changes in its gas composition after passing close to the sun, offering data on its ...

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously unknown world may be lurking in the outer reaches of the solar system. The ...

NASA plans to launch a wildly ambitious nuclear-powered octocopter to Saturn’s largest moon, Titan, in 2028 Medieval poets wrote about auroras. Their work is providing clues to the solar cycle ...