According to NASA, there are more than 27,000 pieces of space debris bigger than the size of a softball currently orbiting Earth.

If the known laws of physics hold, then a galaxy-spanning human civilization is impossible. Unless of course you can build a warp drive.

Preventing pieces of space debris from crashing into each other is a problem engineers have been grappling with for decades.

New findings from NASA's Juno probe orbiting Jupiter provide a fuller picture of how the planet's distinctive and colorful cloud processes.

On isolated mountaintops across the planet, it is time to look at the supermassive black hole at the heart of our Milky Way galaxy.

Astronomers have reported the discovery of a structure thought to be a "protocluster" of galaxies 11 billion light-years from Earth.

Researchers have developed a concept that would make rocket fuel on Mars, that could be used to launch future astronauts back to Earth.

Researchers from Chile directly measure the amount of both water and carbon monoxide in the atmosphere of a planet in another solar system.

The lightweight flexible holographic lenses, many meters in diameter, could be rolled for launch and unfurled in space.

A planet transiting a star outside of the Milky Way galaxy may have been detected for the first time by the Chandra X-ray Observatory.

Water is essential for life on Earth and other planets, and scientists have found ample evidence of water in Mars’ early history.

The ‘gravity tractor’ method of asteroid deflection involves flying a spacecraft close enough to an asteroid so its gravitational attraction

Researchers present a numerical estimate for the amount of encoded information in all the visible matter in the universe.

When NASA's James Webb Space Telescope launches, it will undergo one of the most harrowing deployment processes any spacecraft has endured.

Firing a nuclear warhead at a small asteroid on a collision course with the Earth could stop 99 percent of it from hitting the planet.

Between 1982 and 2020, at least 51,512 people were rescued on land and at sea with help from a network of Earth-orbiting satellites.

Australia has agreed to build a 20-kilogram (44-pound) semi-autonomous lunar rover for NASA to take to the moon as early as 2026.

Skywatchers around the world turned their attention toward asteroid 2012 DA14, a cosmic rock about 150 feet (50 meters) in diameter.

The planet Venus can be seen as the Earth's evil twin. At first sight, it is of comparable mass and size as our home planet.

Scientists have discovered stars unexpectedly blasting out radio waves, possibly indicating the existence of hidden planets.