Fifty years ago on Dec. 21, 1968, Apollo 8 launched from Pad A, Launch Complex 39, Kennedy Space Center at 7:51 a.m. ES).

Russian Search and Rescue teams arrive at the Soyuz MS-09 spacecraft shortly after it landed with Expedition 57 crew members.

SpaceX’s Crew Dragon spacecraft and Falcon 9 rocket are positioned at the company’s hangar at Launch Complex 39A at NASA’s Kennedy Space Center in Florida, ahead of the test targeted for Jan. 17, 2019.

Engineers built a tank identical to the Space Launch System tank that will be flown on Exploration Mission-1, the first flight of Space Launch System and the Orion spacecraft for testing.

For most of human history, we mortals have dreamed of taking to the skies. Then, 115 years ago on on December 17, 1903, Orville and Wilbur Wright achieved the impossbile.

Before electricity, water fountains worked by relying on gravity to channel water from a higher elevation to a lower one. In space, awesome gaseous fountains have been discovered in the centers of galaxy clusters.

NASA astronauts Anne McClain (background) and Serena Auñón-Chancellor are pictured inside the U.S. Destiny laboratory module aboard the International Space Station.

The Washington National Cathedral is seen lit up with space imagery prior to the Smithsonian National Air and Space Museum’s Spirit of Apollo event commemorating the 50th anniversary of Apollo 8, Tuesday, Dec. 11, 2018 in Washington, DC.

The Washington National Cathedral is seen lit up with space imagery prior to the Smithsonian National Air and Space Museum’s Spirit of Apollo event commemorating the 50th anniversary of Apollo 8, Tuesday, Dec. 11, 2018 in Washington, DC.

Less than three months into its mission, NASA’s Ice, Cloud and land Elevation Satellite-2, or ICESat-2, is already exceeding scientists’ expectations.