For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare great planetary alignment. Here's how to make sure you don't miss this ...

The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet system 130 light-years away that has long been a ...

The term may appear confusing, since the planets cannot actually fully line up in the three-dimensional solar system exactly as they may be seen in pictures; rather, it's our perspective of the ...