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 ...

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.

In 2015, astronomer Tabetha Boyajian and colleagues announced the discovery of unusual light fluctuations coming from a star ...

Voyager 1, launched in 1977 and traveling for nearly 50 years, has not yet traveled the distance light covers in one day.