A gallery of photos, visualizations, and other pictures of outer space.
Breaking up the space launch monopoly
Budget and scheduling constraints could put astronauts at risk
More than 200,000 aspiring space explorers volunteered for a one-way trip to Mars. Are they insane?
What's on the horizon for the New Horizons spacecraft
NASA will attempt to launch the unmanned capsule again on Friday morning
With no plans for future upgrades, the telescope faces a fiery end
This short sci-fi film, narrated by Carl Sagan, inspires us to explore the solar system
Festivities in free fall
Because when rockets are truly reusable, they're going to need a place to park.
This Soyuz rocket launched the remaining crew of Expedition 42 into orbit on Sunday
Crowdfund this spacecraft and put a piece of yourself in a lunar time capsule
Astronaut Leroy Chiao explains what it will take for commercial passengers to fly into space
One professor says an asteroid survey would be a better use of NASA's time and money.
Yesterday's Antares failure was not exactly unprecedented.
A new vehicle design could enable same-day shipping from the ISS to Earth, making science experiments in microgravity cheaper and easier.
Human hibernation could be a great way to get to Mars (and beyond), but a few big questions remain.
But CEO Bas Lansdorp says the study used bad data.
If Sierra Nevada can't build its vehicle, no one else can.
Will NASA be required to fund the Dream Chaser?
The record-breaking rodents will travel to the International Space Station this weekend.
And it can be yours -- for a small fee
Rosetta is on a journey to unlock the history of the solar system.