Jesse Emspak

The fiery glory of the sun's surface is on display in a new, ultra-high-resolution video of Mercury's May 10 transit of the star.

John Hornick, author of "3D Printing Will Rock the World," said 3D printing will fundamentally alter the way people manufacture things, and that includes working in space.

Jupiter's moon Europa might be able to support life even if there's little or no volcanic activity under the satellite's icy shell, a new study suggests.

On May 16, the International Space Station launched the first miniature satellite, called a cubesat, designed and built by grade-schoolers.

Bubbles in ancient Australian lava reveal that the early Earth's atmosphere might have been half as thick as it is today, scientists say.

Here are the biggest challenges Stephen Hawking and others on the Breakthrough Starshot team will have to overcome to make interstellar spaceflight a reality.

The new documentary "Space Men," which premieres Tuesday (March 1) on PBS, tells the story of the high-altitude balloon flights that helped pave NASA astronauts' way to space.

An international band of asteroid experts gathered Tuesday to discuss the future of asteroid research and avoidance in preparation for the second annual Asteroid Day.

Paraglider Horacio Llorens has always wanted to fly with the gorgeous northern lights. In January 2016, he finally got his wish and Red Bull was there to capture the photos and video.

NASA's Lunar Reconnaissance Orbiter has found the moon crater created by the impact of the Apollo 16 mission's S-IVB rocket stage back in April 1972, NASA officials announced last month.

The "Star Wars" universe was introduced to the world in 1977, and it remains as popular as ever. What is it about this fictional universe that has enraptured so many people for so many years?

Photos taken by NASA's New Horizons spacecraft show the changing faces of Pluto and its biggest moon, Charon, over the course of a full day, which lasts 6.4 Earth days on both faraway worlds.

Researchers transformed flickering in the light emissions of galactic nuclei, black holes, superdense white dwarfs and other objects into sound waves. The result? A lot of white noise.

Why do pulsars, one of the universe's most reliable clocks, occasionally speed up? A new theory suggests there's a perfectly flowing fluid at the heart of this mystery.