This evening’s viewing challenge is the planet Mercury. It is less than half a fist above the west-northwestern horizon at ...

Centimeter-sized pebbles have been detected in protoplanetary discs using e‑MERLIN, filling in a critical phase of planet ...

The size of the Solar System and the Universe is truly beyond our comprehension. When we think of the vastness of space, we ...

It took over nine years for New Horizons to reach Pluto after blasting off atop an Atlas 5 rocket on Jan. 19, 2006. After ...

Thousands of solar tornadoes swirl above the sun’s surface at any given moment. These remarkable photos give us a glimpse at these stunning cosmic phenomena.

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

AN INTERSTELLAR space rock zooming through our solar system may be the oldest comet ever seen by humans, according to ...

Astronomers have discovered yet another alien visitor to the Solar System.

Scientists want to study a distant world in the solar system that is classified as a dwarf planet. But some experts think it ...

By flying closer to the Sun than ever, Parker Solar Probe reveals the chaotic birthplace of solar wind and space storms, ...

It was one of the most ambitious missions for NASA since the turn of the century, with photos reshaping what scientists know ...