Lunar eclipses: What are they & when is the next one? By Robert Roy Britt Lunar eclipses occur when Earth's shadow blocks the sun. There are three types; the most dramatic is a total lunar eclipse. Find out when the next one will be.
Arecibo Observatory: Watching for asteroids, waiting for E.T. By Elizabeth Howell Arecibo Observatory has been used to send a SETI message as well as for scanning the skies for approaching asteroids. It collapsed in 2020.
The Laser Interferometer Gravitational-Wave Observatory (LIGO): Detecting ripples in space-time By Adam Mann An overview of LIGO and how it detects gravitational waves coming from the universe.
Asteroid Ryugu: The twirling space rock visited by Hayabusa2 By Adam Mann Information about the asteroid Ryugu, which was explored by the Hayabusa2 spacecraft from 2018 to 2019.
The Very Large Array: 40 years of groundbreaking radio astronomy By Adam Mann Facts and details about the iconic Very Large Array, a radio astronomy facility in New Mexico.
Voskhod program: The Soviet Union's first crewed space program By Adam Mann An overview of the Voskhod spacecraft, which was used during the second Soviet human spaceflight program
Explorer 1: The First U.S. Satellite By Elizabeth Howell Explorer 1 launched the United States into the Space Race.
Sputnik: The Space Race's Opening Shot By Elizabeth Howell The launch of the world's first satellite was the birth of the Space Age.
What is a Satellite? By Elizabeth Howell Artificial satellites from Earth have only populated space since 1957, but there are now hundreds of thousands of objects from our planet in orbit.
2014 MU69: Arrokoth, the most distant object ever explored By Nola Taylor Redd New Horizons' historic flyby of the KBO 2014 MU69, also known as Arrokoth, has revealed incredible insights about the birth of the solar system.
Was there a bang at the end of the universe? By All About Space magazine, Colin Stuart Space mysteries: How gravitational waves could explain how our universe began when another one ended.
Spacewalks: How they work and major milestones By Paola Rosa-Aquino Spacewalks were indispensable for assembling the International Space Station. Today, they remain a crucial component for the space station's continued maintenance.
What is a solstice? By Sarah Wild Twice a year, one hemisphere has its longest day of the year while the other has the longest night. These solstices are the astronomical beginning of winter and summer.
What is an equinox? By Sarah Wild Equinoxes occur twice a year when the sun is directly above the equator, and signal herald the beginning of spring and autumn.
Black Moon 2020: What it is (and why you can't see it) By Joe Rao Tuesday's sky (Aug. 18) is host to a somewhat unusual lunar event in the Western Hemisphere: a third new moon in a season of four new moons, which some people call a "Black Moon."
Mars Reconnaissance Orbiter: 15 key milestones to celebrate 15 years in space By All About Space magazine Here are 15 of the biggest discoveries from NASA’s Mars Reconnaissance Orbiter.
SpaceX's Dragon: First Private Spacecraft to Reach the Space Station By Elizabeth Howell The Dragon spacecraft first reached the International Space Station in 2012 and Crew Dragon became the first private, crewed spacecraft to reach the ISS in 2020.
Space roar: NASA detected the loudest sound in the universe, but what is it? By David Crookes , All About Space magazine The space roar, which was detected by NASA's ARCADE mission in 2006, makes space six-times louder than anyone was expecting — have we finally found the cause?
The Vostok Program: The Soviet's first crewed spaceflight program By Adam Mann A summary of the first Soviet crewed spaceflight program, Vostok, and its many missions.
The Mercury 13: The women who could have been NASA's first female astronauts By Swapna Krishna The Mercury 13 were a group of female pilots who passed the first astronaut tests, but weren't allowed to work for NASA because of their gender.
