The cause of the strange blue spiral is actually a SpaceX Falcon 9 rocket that blasted off from Space Launch Complex 40 ...

Cosmic microwave background data support cosmology’s standard model but retain a mystery about the universe’s expansion rate.

The gas giants outside our solar system are not capable of hosting extraterrestrial life, but do offer clues in a lingering mystery about how distant planets form, researchers said.

Experts are not sure why Neptune's auroras can be seen around the planet's "mid-latitudes," and not the north and south poles ...

A space probe flying past Mars captured images of the red planet's small, mysterious moon. While on a flyby of Mars, Hera was able to use three of its imaging instruments to capture images of ...

Welcome to the classroom activities for the "Mysteries of Deep Space" Web site ... about the latest discoveries and even observe the images provided by the Hubble Telescope.

This data includes three stunning previews of the deep-field space images that Euclid will produce ... scientists are to use its data to crack the mysteries of the "dark universe," the collective ...

Our deepest look into space so far is the 10-day exposure by this telescope, called the Hubble Deep Field, that is celebrated in the first of the three "Mysteries ... and its images will be ...

Floating around at the edge of the Solar System are leftovers from its formation. This is the Kuiper Belt, which is composed of chunks of rock and ice like comets, dwarf planets, and random objects ...

It's no secret that space is full of mysteries. Our species has barely gone past our own planet's moon, and only one of our probes, Voyager 1, has even left the solar system. Much of what we've ...