Watch this one-week time-lapse of the coronal hole in the Sun's atmosphere from NASA's Solar Dynamics Observatory.



Amazing One-Week Time-Lapse Capturing A Gigantic Coronal Hole On Sun Via NASA's Solar Dynamic...

On April 27, 1961, NASA launched Explorer 11, a satellite that contained the first gamma ray telescope to go to space. This marked the birth of space-based gamma ray astronomy. Gamma rays are a form of electromagnetic radiation and have...

On April 25, 1990, the Hubble Space Telescope was deployed! Hubble is famous for taking some of the most amazing deep-space photos ever. It hitched a ride to space on the space shuttle Discovery with mission STS-31. Also on board were...

On April 24, 1970, China became the fifth nation to independently launch a satellite into orbit. Dong Fang Hong I was the first of a series of satellites China launched under the Dong Fang Hong space satellite program. It lifted off on a...

On April 23, 1962, NASA launched the Ranger 4 mission to the moon. After the first three Ranger missions failed, NASA was really happy with the successful launch of Ranger 4. But the fun didn't last long. After a picture-perfect launch...

On April 22, 2010, the U.S. Air Force launched the super-secret X-37B space plane on its first spaceflight. [ This space plane is also known as the Orbital Test Vehicle. It looks a lot like NASA's space shuttle, only it's much smaller...

Jupiter and the crescent moon start off and end the month together. Find out where to see Mars and Venus as well. The Lyrid Meteor Shower peaks on the night of April 21-22. Amazing globular cluster M3 is also available for skywatchers...

On April 21, 1997, the cremated remains of 24 people were launched into space in the first-ever space funeral. One of those people was Gene Roddenberry, the creator of "Star Trek." Other notable people on board included the physicist and...

Mother thanks searchers as missing teenage girl and pet Cockapoo ‘safe and on way home’Source: Various

On April 20, 2016, the moon did not turn green. The moon has never been green and will probably never turn green, despite what any viral internet memes may tell you. This hoax started in 2016 when someone jokingly posted a meme on...

Chinese astronauts Cai Xuzhe and Song Lingdong conducted a spacewalk outside the Tiangong space station. "The primary task was "to install debris protection devices outside" Tiangong to "safeguard its external cables from debris impact,"...

On April 18, 2014, NASA's Lunar Atmosphere and Dust Environment Explorer, also known as LADEE, ended its mission by crashing into the moon. LADEE had spent seven months orbiting the moon and studying its exosphere. The exosphere is a...

On April 19, 1971, the Soviet Union launched the world's first space station, Salyut 1. This space station was a modified version of the Soviet Union's Almaz space station, which was part of a highly classified military program and was...

The Space Launch System rocket's RS-25 engine was fired up for the “final round of certification testing ahead of production of an updated set of the engines," according to NASA. The test occurred at the space agency’s Stennis Space...

NASA astronaut Suni Williams works outside the International Space Station. Credit: NASA | edited by Space.com's Steve Spaleta

On April 17, 1970, Apollo 13 returned to Earth after narrowly avoiding a deadly disaster in space. This was supposed to be the third mission to land on the moon. Astronauts Jim Lovell, Jack Swigert and Fred Haise launched on April 11 and...

A rock sample collected by the Mars Perseverance rover could help answer the question of "whether Mars was home to microscopic life," according to NASA's Jet Propulsion Laboratory. Credit: NASA/JPL-Caltech

See the Blue Origin New Glenn rocket's flight profile and first stage landing in this new animation. Credit: Blue Origin

On April 16, 1972, Apollo 16 launched to the moon! Apollo 16 was NASA's fifth lunar landing and the penultimate mission of the entire Apollo program. Three NASA astronauts were on board: John Young, the commander, Ken Mattingly, the...

On April 15, 2005, NASA launched a spacecraft on a mission to rendezvous with a small communications satellite. The launch went according to plan, but the mission ended abruptly when the spacecraft collided with the satellite. The...

On April 14, 1981, the first space shuttle mission returned to Earth after a two-day flight in space. The space shuttle Columbia safely touched down on Rogers dry lake at Edwards Air Force Base in California, where hundreds of thousands...

NOAA's GOES-18 satellite captured footage of the Palisades and Eaton wildfires in Southern California. Credit: CSU/CIRA & NOAA | edited by Space.com's Steve Spaleta

Ozzy was having trouble acclimating to his new surroundings, until he was introduced to Bruno. Now, the two are "best buds."

On April 12, 1961, a human went to space for the first time! Yuri Gagarin was the first Soviet cosmonaut and the first person to orbit the Earth. This was the Soviet Union's next big move in the "space race" after it launched the first...