Infographic Most astronomers believe the universe began 13.8 billion years ago in a sudden explosion called the Big Bang. Other theorists have invented alternatives and extensions to this idea.
Get to know our nearest stars, their distances in light-years, spectral types and their known planets.
See how John Glenn's Mercury mission put the first American in orbit in 1962 in this SPACE.com infographic.
Paul Allen's Stratolaunch Systems plans to build a giant carrier vehicle in order to air-launch rockets to Earth orbit.
Postage-stamp-sized space probes could make a flyby of planets around Alpha Centauri within 20 years after launch.
Learn all about the X-ray astronomy satellite Hitomi, a satellite built by the Japan Aerospace Exploration Agency that launched in February 2016 and fell silent just over a month later.
Bigelow Aerospace's BEAM expandable module will enhance the living area of the International Space Station.
Moon Astronomy Lesson: See the moon phases, and the difference between a waxing and waning crescent or gibbous moon, in this Space.com infographic about the lunar cycle each month.
Check out this fantastic photo essay about the history of the Orion III space plane, from the sci-fi movie epic "2001: A Space Odyssey," including images of an incredibly accurate, fan-made model.
The European Space Agency's ExoMars project involves an orbiter, lander and rover, launched on two separate Proton rockets.
The British company Reaction Engines Ltd. hopes to manufacture Skylon, a runway-to-orbit space plane using hybrid air-breathing rocket engines.
DARE is a proposed lunar satellite that would study the early era of the universe when the stars first starting turning on.
Researchers say an anomaly in the orbits of distant Kuiper Belt objects points to the existence of an unknown planet orbiting the sun.
How is a supernova different from a hypernova? Learn about the different types of exploding stars that astronomers have identified.
Ridley Scott's new space film showcases a lot of space hardware derived from actual NASA plans for interplanetary travel.
Planned in the 1960s but never realized, the Gemini-based manned spy satellite was finally declassified in 2015.
A planet close to its parent star is hot like Venus, but rotates quickly and could have a substantial atmosphere.
Spoiler Alert! Here's the complicated math problems Mark Watney has to solve in order to survive in "The Martian."
Since 2004, the Cassini space probe has orbited Saturn, collecting photos and data that have revolutionized our understanding of the planet and its moons.