The '60s were all about the moon, while '80s babies saw the first detailed photos of Saturn and Jupiter.

August 24, 2006 was a dark day for Pluto enthusiasts. It was on that day that the International Astronomical Union established three conditions a celestial body must meet in order to be considered a planet. A planet must orbit around the sun, it must be massive enough to be rounded by its own gravity, and it must have “cleared the neighborhood” around its orbit, which means, simply put, that it must have a certain amount of gravitational pull.

At an upcoming summit in early December, NATO is expected to declare space as a "warfighting domain," partly in response to new developments in technology. If it does declare space a war zone, NATO could start using space weapons that can destroy satellites or incoming enemy missiles. But what is this technology and how could it enable a war?

The United Kingdom is sending a small, four-legged robot to the moon in 2021. The tiny rover, which looks like a cross between a spider and a children’s toy, will be the first moon rover for the U.K. It will also be the first rover with legs to walk on the moon.

Space Mysteries: If the universe is 13.8 billion years old, how can a star be more than 14 billion years old?

A new way of studying planets in other solar systems - by doing sort of an autopsy on planetary wreckage devoured by a type of star called a white dwarf - is showing that rocky worlds with geochemistry similar to Earth may be quite common in the cosmos.

NASA astronauts Christina H. Koch and Jessica Meir made history today, taking part in the first-ever spacewalk in the agency’s history featuring only women. The two astronauts ventured outside of the International Space Station in order to effect a repair on a failed power controller for the …

Documents show Elon Musk's firm SpaceX wants to launch another 30,000 satellites - more than triple the total amount humans have ever launched

The new research found irradiated mice were overly anxious, avoided light transitions, couldn't easily learn and remember, and showed behaviors linked to PTSD.

Former NASA astronaut Mike Massimino breaks down all the differences between using the bathroom, washing your hair, and brushing your teeth on Earth and in space. How do you take showers in space?

NASA revealed new spacesuits, specifically created for the Artemis generation of missions, which aim to get the first American woman and the next American man to the surface of the Moon by 2024.

The milestone is long overdue.

For many wannabe astronauts, venturing into the great unknown would be a dream come true. But it can easily turn into an astronaut's worst nightmare.

How the first human to take steps in outer space nearly didn't return to Earth

You’ve heard it before: In space, no one can hear you scream. That’s because sound doesn’t move through a vacuum, and everyone knows that space is a vacuum. The thing is, that’s not completely true.

Things haven’t quite gone to plan for India's Chandrayaan-2 mission, with the team losing the spacecraft’s Vikram lander following a touchdown attempt last month. But there is still plenty of science to come as the probe continues to circle the Moon, with the latest imagery relayed by the orbiting…

China has broken new ground, successfully growing cotton on the moon for the first time. The experiment was part of the Chang'e 4 project, in which China is exploring the far side of the moon with a lander. The cotton plant was one of several organisms encased in a mini biosphere aboard the lander.

An international team of scientists is constructing the Large Synoptic Survey Telescope in Chile, which will be an essential tool for asteroids alert.

UC Riverside-led research shows our galaxy is undergoing a massive merger with its largest satellite galaxy, the Large Magellanic Cloud

Primordial black holes born in the moments after the big bang could clear up some of cosmology's most confounding conundrums