Kathryn Sullivan: Spacewalker and Earth Explorer By Charlie Wood Few know the globe's nooks and crannies more intimately than Kathryn Sullivan — explorer and student of the sky and the sea.
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 is the next one.
Solar Eclipse Guide 2019: When, Where & How to See Them By Hanneke Weitering The third and final solar eclipse of the year is coming up on Dec. 26. Here's a guide to when, where and how to see it.
SpaceX: Facts About Elon Musk's Private Spaceflight Company By Elizabeth Howell SpaceX is a pioneering private spaceflight company that's been sending NASA's cargo to the space station since 2012.
Geminid Meteor Shower: Dust From an Asteroid By Elizabeth Howell The Geminids come from an asteroid, 3200 Phaethon, but scientists are still trying to figure out exactly how it sheds enough debris to produce the bright meteor shower.
Perseus Constellation: Facts About the Hero By JoAnna Wendel Perseus is one of the largest constellations and is home to one of the most famous stars in our sky.
Leonid Meteor Shower: Bright Fireballs in November By Elizabeth Howell The Leonids take place every year in November. Once a generation, it is possible for a storm of meteors to occur with a peak of about 1,000 an hour – or even more.
McDonald Observatory: Searching for Dark Energy By Elizabeth Howell McDonald Observatory, in West Texas, represents eight decades of progress in telescope technology and offers an extensive menu of public programs.
NASA's SOFIA Observatory: The Flying Telescope By Charlie Wood Flying at the very tip-top of Earth's atmosphere, SOFIA has almost as clear a view as space-based telescopes.
There's Something Strange Going On Inside Neptune By David Crookes , All About Space magazine Are planetary burps to blame?
Yerkes Observatory: Home of Largest Refracting Telescope By Steve Fentress The Yerkes Observatory is more than 120 years old and is most known for contributing to discoveries about stellar motion and cartography.
X-37B: The Air Force's Mysterious Space Plane By Mike Wall A look at the U.S. Air Force's unmanned X-37B space plane, which has flown four secret, long-duration missions in Earth orbit to date.
Green Bank Observatory: Pioneering Radio Astronomy By Tim Childers Home to the largest fully steerable telescope in the world, Green Bank Observatory has a long history of leading the world in radio astronomy.
The Black Knight Satellite: A Hodgepodge of Alien Conspiracy Theories By David Crookes , All About Space magazine Some think it could be an extraterrestrial spacecraft — but is it?
Hope Mars Mission: Launching the Arab World into the Space Race By Jeremy Rehm When the UAE president announced that his country would make a satellite to study Mars' atmosphere in unparalleled detail, he set an unprecedented goal for the Arab world.
Jupiter's Great Red Spot: Our Solar System's Most Famous Storm By JoAnna Wendel It's been a great, enormous storm for more than a 100 years. But will Jupiter's Great Red Spot last much longer?
