NASA
Why is Venus hotter than Mercury, when Mercury is closer to the Sun?
While Mercury is closest to the Sun, Venus holds the record for the highest temperatures in the solar system due to its dense, carbon dioxide-rich atmosphere.
Curiosity rover captures close-up images of elemental sulfur crystals on Mars
High-resolution images from the Curiosity rover reveal elemental sulfur crystals found after a rock was accidentally crushed. The discovery adds to a history of chemical analysis in Gale Crater.
Sick of Earth? NASA is recruiting volunteers for a yearlong Moon and Mars simulation
NASA's new Moon and Mars Exploration Analog (MMEA) will be the first integrated simulation to combine spacecraft transit and planetary surface living.
NASA's New Horizons spacecraft wakes from its longest hibernation in good health
After awakening from its longest hibernation to date, New Horizons is resuming active operations to study the outer heliosphere and identify new Kuiper Belt objects.
NASA Rover's Organic Carbon Discovery Sparks Mars Life Debate
The detection of macromolecular carbon in ancient Martian mudstones suggests Mars may have once been widely habitable, though the origin of the molecules remains unconfirmed.
Pentagon releases documents on Apollo 17 unidentified phenomena sightings
Newly released government files detail mysterious observations made by astronauts during the Apollo 17 mission and other early space flights.
Katalyst launches robotic spacecraft to rescue NASA Swift Observatory
A robotic spacecraft developed by Katalyst Space Technologies has launched to intercept and tow NASA's sinking Swift Observatory back to a stable orbit.
Last-minute launch problem delays satellite rescue mission for NASA
A data stream warning halted the launch of the Link spacecraft, which is tasked with capturing and reboosting the decaying Swift Observatory before it crashes.
NASA to Launch Robotic Mission to Save Falling Space Telescope
NASA has partnered with Katalyst Space Technologies to deploy a specialized robotic vehicle designed to intercept and tow the aging Swift telescope to a stable orbit.
Chandra Shows Red, White, Blue Space for US 250th
NASA celebrates the 250th birthday of the United States with a collection of red, white, and blue cosmic images and accompanying sonifications.
NASA robot mission aiming to rescue space telescope
A high-risk robotic mission aims to tow the aging Neil Gehrels Swift Observatory into a higher orbit to prevent it from burning up in Earth's atmosphere.
NASA rescue mission to prevent Swift telescope from falling back to Earth
A private robotic mission will attempt to grapple and tow the Neil Gehrels Swift Observatory back to a stable orbit to prevent an uncontrolled reentry.
NASA races to save Swift telescope from falling back to Earth with daring rescue mission
NASA and startup Katalyst Space Technologies are launching a robotic mission to boost the aging Swift Observatory into a higher orbit to prevent it from burning up in Earth's atmosphere.
NASA hires Katalyst Space to rescue Swift telescope from orbital decay
NASA has contracted startup Katalyst Space to deploy a robotic spacecraft designed to intercept and tow the Neil Gehrels Swift Observatory to a stable orbit.
NASA's James Webb Telescope Observes Millions Of Stars Within 'Cigar Galaxy
New NIRCam data from the James Webb Space Telescope pierces through cosmic dust to reveal the distorted structure and intense stellar birth of Messier 82.
Astronomers found two rare super puff planets lighter than cotton candy
Two giant exoplanets with densities lower than cotton candy have been found orbiting a dwarf star 1,110 light years away. The rare discovery provides a new puzzle for scientists studying how giant planets form.
NASA PACE mission tracks wildfire smoke and vegetation risk
The PACE satellite is leveraging unexpected land-observation capabilities to identify fire-risk areas and monitor the atmospheric drift of smoke plumes.
Strawberry Moon to peak June 29 as first full moon of summer
The first full moon of summer arrives on June 29, appearing as a micromoon due to its distant orbit from Earth. Discover the best viewing conditions and the cultural origins of its name.
US and China moon base plans could drive Earth-based design breakthroughs
The geopolitical race to establish permanent lunar outposts is accelerating breakthroughs in engineering and psychology that could transform life on Earth.
Large asteroid will safely pass by Earth on Saturday
A massive 'potentially hazardous' asteroid is set for a safe close approach to Earth. Astronomers will use the event to conduct rare radar observations and improve planetary defense data.