Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

As scientists wait for the asteroid to reappear, its revised trajectory is now drawing attention to another possible target: ...

The solar system floats inside a vast, million-degree hot bubble—an invisible cocoon of thin gas that glows in X-ray light. Known as the Local Hot Bubble (LHB), this low-density cavity stretches more ...

Key materials for life which were previously only found on Earth were discovered circling a baby star, and now boffins think ...

It all boils down to the apparent brightness of an object, or in astronomical parlance, its apparent magnitude. There are ...

The Solar Dynamics Observatory saw a lunar transit and an Earth eclipse on July 25 — the first when the moon passed between it and the sun, and another when Earth did the same.