The New Millennium Program explored new technology in space to reduce mission costs.
As they prepare for their first lap around the Milky Way, our galaxy's nearest neighbors have shown a dramatic increase in star formation.
Although one of the twin spacecraft is no longer in contact with Earth, NASA's STEREO mission continues to provide insights about the sun.
Scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years.
A beautiful image of the Milky Way's closest galactic neighbor provides insight into how stars form.
Crashing a giant space rock into a young planet can strip off some or all of its atmosphere, creating a wealth of different types of worlds.
Pioneers 10 and 11, Voyagers 1 and 2, and New Horizons are the only spacecraft currently capable of leaving the solar system. Which one will be the next to go?
New Horizons' historic flyby of the KBO 2014 MU69, or Ultima Thule, is revealing incredible insights about the birth of the solar system.
Before their fiery demise, NASA's twin GRAIL spacecraft mapped the moon in a quest to learn more about our closest neighbor.
Astronomy may focus on the stars, but occasionally something happens to bring it back down to Earth — like a swarm of insects shorting out their telescope.
The atmosphere surrounding the largest TRAPPIST-1 planet makes a strong case for it being a rocky world.
The primary mission for NASA's Deep Space 1 was to test out a dozen new advanced technologies. During the spacecraft's ride through space, it also swung by an asteroid and a comet.
Hubble has captured the universe for nearly 30 years. A new report estimates that the telescope will continue to function for at least another five.
One of Earth's nearest exoplanet neighbors, the planet orbiting Barnard's Star, may still have a chance at hosting life, despite its frigid temperatures.
NASA's Phoenix Mars Lander was a recycled spacecraft that became the first spacecraft to sample water on Mars.
The newest snowman-like image of Ultima Thule (2014 MU69), a pristine object from the dawn of the solar system, is already revealing insights into how planets form.
Only moments before New Horizons flew by the most distant solar system object ever visited, astrophysicist and Queen guitarist Brian May released his new single based on the mission.