The Galilean Moons, named in honor of Galileo Galileo, who first observed them in 1610, are a fascinating collection of satellites. For decades, scientists have been immensely fascinated by the three icy companions – Europa, Ganymede, and Callisto – which have oceans in their interiors that possibly support life. But Io has also been a focal point of interest lately, owing to the volcanic activity on its surface and lava plumes reaching 300 to 500 km (186 to 310 mi) into space. Since 2016, NASA’s Juno probe has provided stunning images of Io as it continues to orbit its main science objective, Jupiter.
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NASA test-fires rocket motors that will help launch samples off Mars (video)
NASA has test-fired rocket motors as part of the development of an ascent vehicle designed to launch samples off the surface of Mars.
Win a free 'Asteroid City' Blu-ray and more in this Facebook giveaway!
Enter to win some cool "Asteroid City" merchandise in this free Facebook giveaway
Instruments for NASA's VERITAS Venus mission get a test in Iceland (photos)
This summer, the German Aerospace Center is testing instruments for NASA's VERITAS Venus mission on Iceland's lava flows, a stand-in for the hellishly hot planet.
Researchers Match Up 12 Meteorites with the Near-Earth Asteroids They Came From
Every day meteoroids blast through our planet’s atmosphere to hit the ground as meteorites. A team of researchers in Italy traced twelve of them to progenitor asteroids that orbit in near-Earth space.
After 17 years away, NASA's sun-studying spacecraft will visit Earth on Aug. 12
NASA's groundbreaking spacecraft STEREO-A will return to Earth for a flying visit on Saturday (Aug. 12). The spacecraft, which has been away for 17 years, will team up with other NASA missions during its return.
This shoebox-sized gadget will make sure astronauts breathe safely on NASA's Artemis moon missions
A multimillion-dollar laser air monitoring system onboard upcoming Artemis missions is expected to help protect astronaut health.
Evidence for Modified Gravity Found in the Motions of Binary Stars
With our continued failure to discover dark matter particles, it’s worth considering alternatives. While dark matter is the most widely supported model, the alternatives fall into two broad paths. One is that we should look to extended models of general relativity, such as conformal gravity. The other argues we should modify the very nature of Newtonian dynamics. The first approach tends to be popular with theorists since it focuses on an abstract theory in the same vein as Einstein’s original ideas. The second, often known as Modified Newtonian Dynamics, or MoND, tends to be more popular with observational astronomers.
Asteroid struck by NASA's DART probe to be radar-scanned with Hera mission
The radar component for a CubeSat is being sent to study asteroid Dimorphos has been delivered to ESA for integration with its spacecraft.
Apple MacBook Air M2 15-inch laptop review
Apple’s MacBook Air M2 gets supersized, with predictably impressive results.
Ancient mud cracks on Mars suggest Red Planet may have been more habitable than thought
Ancient mud cracks found by NASA's Curiosity rover suggest that Mars underwent a repeated cycle of wet and dry spells that could have supported the emergence of life.
Aftermath of Hawaii's deadly wildfire inferno revealed in gut-wrenching satellite images
An out-of-control wildfire erupted on the drought-stricken island of Maui earlier this week, wreaking havoc on the Hawaiian town of Lahaina. Satellites provide a sobering view of the scope of destruction.
Vaonis' Hestia Kickstarter to turn smartphones into smart telescopes crosses $2 million with a week to go
A Kickstarter campaign for Hestia, a system that turns a smartphone into a smart telescope, has crossed the $2 million dollar mark with under a week left to go.
Everything we know about Warhammer 40K: Space Marine 2
We’re diving back into the grim darkness of the 41st millennium once again, as Titus returns in Warhammer 40K: Space Marine 2. For Ultramar!!!
Nightfox Swift night vision binoculars review
A budget pair of night vision binoculars that can be recharged as well as head-mounted for hands-free surveillance.
Cosmonaut Alexander Viktorenko, who flew to Mir space station four times, dies at 76
Russian cosmonaut Alexander Viktorenko has died at 76. Viktorenko's 19-year career included commanding four missions to the Mir space station.
Anycubic Photon Mono M5s review: 12K printing is here
Unbeatable print quality and smart tech make the Photon Mono M5s the 3D printer to beat going forward.
NASA's Parker Solar Probe to make closest flyby of Venus on Aug. 21
Thanks to some precise maneuvering on Aug. 3, NASA says Parker is on-track to make its sixth and closest flyby of Venus on Aug. 21.
Shiny Perseid meteors light up a dark sky in Portugal (video)
The Perseid meteor shower will bring shooting stars to your neighborhood on Aug. 11 and Aug. 12. You can get a preview of the spectacular show in this video.
Perseid meteor shower peaks this weekend — but 2028's show might be one for the ages
The annual Perseid meteor shower should put on a nice show this weekend — but a spectacular Perseid display appears to be in the cards five years from now.
