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 ...

What if there’s a planet hiding in our solar system, 10 times larger than Earth? While this theory has yet to be confirmed, ...

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 ...

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.

Several planets stand still in the sky, Titan’s shadow transits Saturn, and Venus gives Taurus a second eye in the sky this ...

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

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

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 ...

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