With a sun more than 4.5 billion years old, our solar system is considered "middle-aged," and the pictures of what it might ...

Whenever planets are visible in the night sky, they always appear roughly along the same line. This path, known as the ...

The composite image shows seven of the solar system's planets from Earth, after sundown on Feb. 22. | Credit: Josh Dury A ...

New images of the planet Mercury taken by a robotic spacecraft have just been released — and they show the scorched world ... This latest round of photos comes via the spacecraft's sixth flyby ...

a manoeuvre that will assist the spacecraft in entering orbit around Mercury late next year. Despite Mercury being the closest planet to the Sun, the pictured craters are some of the coldest ...