Tomorrow, the spacecraft will shift from its orbit of Earth toward a path to the moon.

At Palomar Observatory near San Diego, a dedicated telescope spends its nights surveying the heavens. A recent analysis of its data revealed 4 stars that change in brightness, over just minutes.

Snowball planets are rocky worlds with frozen oceans. They were thought to be lifeless. But a new study suggests some might have land areas near their equators warm and wet enough to support life.

New Horizons provided close-up images of Pluto in 2015. For many on Earth today, these spacecraft images provide a once-in-a-lifetime glimpse of Pluto. Read about the new Pluto feature names.

This new Hubble Space Telescope portrait of Jupiter reveals a smaller-than-usual Great Red Spot and an intense color palette in Jupiter's swirling clouds. NASA said, "The colors, and their changes, provide important clues to ongoing processes in Jupiter’s atmosphere."

Here’s what the Curiosity rover is seeing after 7 years on Mars. Curiosity captured this 360-degree interactive panorama on June 18.

It's likely Mars was once a water world with rivers, lakes and maybe even an ocean. New research lends support to the possibility that an asteroid slammed into Mars' ocean 3.5 billion years ago, creating a vast tsunami.

Our universe is a tapestry of galaxy congregations and vast voids. An international team of astronomers has now published a new study revealing more of this cosmic structure as it appears surrounding our Milky Way.

Analysis of measurements via the Gaia space telescope - of star positions, brightnesses and distances - has let astronomers probe a merger 10 billion years ago between the primitive Milky Way and a dwarf galaxy called Gaia-Enceladus.

Io's volcanoes have fascinated scientists since the Voyager 1 spacecraft first discovered them nearly 40 years ago. Now a comprehensive new report - based on ground-based studies - unveils new mysteries about the most volcanically active world in our solar system.