Red Dwarfs: The Most Common and Longest-Lived Stars By Nola Taylor Redd Most of the star nearest to Earth are red dwarfs, but they are too dim to be seen with the naked eye.
What Is the Grandfather Paradox? By Greg Uyeno If time travel is possible, it must avoid the contradiction of the grandfather paradox.
What Are Skyrmions? By Adam Mann Skyrmions are simple. They're just itty-bitty nano-magnetic vortices.
UFOs Are Real, But Don't Assume They're Alien Spaceships By Mike Wall UFOs are very real, as we have recently seen — but that doesn't mean E.T. has been violating our airspace.
What Is a Light-Year? By Tim Childers Light-years make measuring astronomical distances a bit more manageable.
Stratolaunch Systems: Building the World's Largest Airplane By Adam Mann Stratolaunch is the builder of the world's first megaplane.
Best Science Fiction Books By Space.com Staff Here are the some of the best science fiction books Space.com's writers and editors have read and loved.
Saturn: Facts About the Ringed Planet By Charles Q. Choi Learn about the physical characteristics of Saturn and its famous rings, what we know about Saturn’s moons and Saturn’s roots in Greek mythology.
Apollo 11: First Men on the Moon By Nola Taylor Redd Apollo 11 astronauts were the first to leave footprints on the moon.
The First Space Shuttle Flight Into Space By Nola Taylor Redd The first launch of the space shuttle Columbia touched off a new era in space flight.
Space Launch System: NASA's Next Generation Rocket By Nola Taylor Redd NASA's Space Launch System aims to carry humans far beyond Earth.
Event Horizon Telescope: An Earth-Size Black Hole Camera By Greg Uyeno The Event Horizon Telescope produced the first-ever image of a black hole.
Challenger: The Shuttle Disaster That Changed NASA By Elizabeth Howell The space shuttle Challenger was one of NASA's greatest triumphs and also its darkest tragedy.
Huge Asteroid Apophis Flies By Earth on Friday the 13th in 2029. A Lucky Day for Scientists By Meghan Bartels The solar system has a sense of humor: A decade from now, on Friday, April 13, 2029, a large asteroid will streak across the sky — but it's a cause for excitement, not fear, scientists say.
The Kuiper Belt: Objects at the Edge of the Solar System By Nola Taylor Redd Beyond Neptune, the Kuiper Belt is a vast region of icy objects called Kupier Belt Objects (KBOs), including dwarf planets Pluto, Eris, Maumea and Makemake — and possibly a true ninth planet.
How and Why Do Planets Die? By Nola Taylor Redd Fire, ice, volcano or star — planets have a variety of ways to die.
The Most Extreme Human Spaceflight Records By Mike Wall A look at some of the records people have set during spaceflight.
What Is the Eagle Nebula? By Nola Taylor Redd This impressive cloud of cosmic gas and dust is an ancient star nursery.
