What Is Dark Matter? By Nola Taylor Redd Roughly 80% of the mass of the universe is made up of dark matter, a material that scientists cannot directly observe. So why do scientists think it dominates?
What Is NASA's Wide Field Infrared Survey Telescope (WFIRST)? By JoAnna Wendel NASA’s future flagship telescope, WFIRST, will help us find potentially habitable exoplanets and study a mysterious phenomenon called dark matter.
Chandrayaan-2: India's Orbiter-Lander-Rover Mission By Elizabeth Howell Chandrayaan-2 is India's planned second mission to the moon. It will consist of an orbiter, a lander and a rover.
What Are Black Holes? By Nola Taylor Redd Black holes are mysterious objects of extreme density, with such strong gravitational attraction that even light cannot escape from their grasp if it comes near enough.
What Is String Theory? By Charlie Wood String theory started as a simplification of everything, but has become increasingly complex over the years.
Eris: The First Dwarf Planet By Nola Taylor Redd The discovery of Eris led to Pluto's demotion to dwarf planet.
Uranus: The Ringed Planet That Sits on its Side By Charles Q. Choi Uranus is the seventh planet from the sun and was the first to be discovered.
Ed White: The First American to Walk in Space By Tim Childers Ed White, the first American to walk in space, was a pioneer of human spaceflight.
Solar Eclipses: When Is the Next One? By Joe Rao Solar eclipses are one of nature’s grandest events. What is a solar eclipse? Why are there different kinds of solar eclipses? How do they work? And when is the next one? We explain.
Night Sky, July 2019: What You Can See This Month [Maps] By Chris Vaughan Find out what's up in your night sky during July 2019 and how to see it in this Space.com stargazing guide.
The Wright Brothers and the First Airplane Flight By Elizabeth Howell The Wright Brothers’ first plane flight in Kitty Hawk lasted just 12 seconds in 1903, but Orville and Wilbur made history with their Wright Flyer.
The First Flight: Wright Flyer By Jeremy Hsu The 1903 Wright Flyer that made history's first flight was a relatively simple machine with propellers and wire controls.
Charles Lindbergh and the First Solo Transatlantic Flight By Nola Taylor Redd "Lucky Lindy" electrified the world and changed public opinion about air travel.
Vera Rubin: The Astronomer Who Brought Dark Matter to Light By Tim Childers Vera Rubin's discoveries showed that our universe is much more mysterious than anyone imagined.
New Horizons: Exploring Pluto and Beyond By Elizabeth Howell The New Horizons spacecraft reached the dwarf planet Pluto in July 2015.
White Holes: Black Holes' Neglected Twins By Charlie Wood You've heard of black holes, but what about their inverted twins — white holes?
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.
