Comets are notoriously unpredictable. Some of the most spectacular of these icy visitors pop up unexpectedly, careening ...

The Earth started as a mixture of gas and dust around the Sun and grew as it collided with asteroids and dust particles.

Look west this evening after sunset to catch a glimpse of bright Jupiter, slowly setting between the horns of Taurus the Bull ...

NASA has revealed its top skywatching tips for May, and they include a meteor shower, lots of planets, and possibly a nova.

Meanwhile, astronomers are keeping watch for a rare nova—a sudden explosion of a distant star—that could appear to the naked eye sometime in the coming months. When it happens, the nova will ...