Mercury reaches its greatest elongation, 26 degrees east of the sun on July 4. From latitude 40 degrees north, the ...

Venus continues to be the “Morning Star” in the east before dawn, albeit it has become dimmer — but still bright — as it ...

One summer night in 1877, American astronomer Asaph Hall was looking through his telescope in Washington, D.C. Mars was at ...

Galileo started this quest over 400 years ago, and scientists finally were able to peek at one of the biggest mysteries of ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

Passing stars could trigger instability across the solar system, resulting in Earth being hauled out of its orbit.

Researchers in the US have suggested there is a 40 percent chance a ninth planet could exist in our solar system. Planet Nine ...

Our solar system is made up of the sun and all the amazing objects that travel around it. Learn more about the planets, asteroids, and comets in our solar system. 3:55 ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

President Donald Trump’s fiscal 2026 budget request, if approved by Congress, would kill many of NASA’s plans for robotic ...

Researchers now appreciate that gas planets are more complex than first thought. New findings have implications for our ...