Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...

The Owl Nebula is an example of a planetary nebula — a type of object that yields glimpses of stellar death in slow motion.

A team of researchers has outlined how a new "direct fusion drive" propulsion system could allow us to reach Sedna this ...

"Its occurrence is like finding a tropical seed in Arctic ice – indicating either an unexpected local environment or ...

Asteroids are small rocky bodies that travel around the Sun. They are much smaller than planets. They are very important because they can give us clues about the early composition of the Solar System.

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

Mercury is the month's highlight, reaching greatest elongation July 4. Also on show in the Southern Hemisphere: Mars, Saturn, ...