The comet that rambled past us from another star last year likely originated in a cold, isolated corner of the galaxy that had yet to gel into its own solar system, astronomers reported Thursday.

Ganymede is not only Jupiter’s largest moon, but also the largest in our solar system and one of the few that hosts a massive ice ocean. Adding to this planet-like moon’s uniqueness is the fact that among the hundreds of moons in our solar system, Ganymede is the only one that generates its own magnetic field. While the prevailing view was that Ganymede generates this magnetic field through convection in an already-formed core, there are still uncertainties surrounding this idea.

For the first time, scientists have measured the instantaneous mind-blowing power of jets blasting from a black hole.

NASA’s Psyche spacecraft will get a boost from Mars on Friday, May 15, passing just 2,800 miles (4,500 kilometers) from the planet’s surface at some 12,333 mph (19,848 kph). The spacecraft will harness the planet’s gravitational pull to speed up and adjust its trajectory toward the metal-rich asteroid Psyche, one of the more unusual objects in our solar system.

The European Space Agency (ESA) and the Japan Aerospace Exploration Agency (JAXA) have signed a Memorandum of Cooperation to deepen collaboration in planetary defense, alongside a dedicated agreement for collaboration on the Rapid Apophis Mission for Space Safety (Ramses) to the near-Earth asteroid Apophis.

Researchers at National Jewish Health have published new findings demonstrating that short-duration spaceflight may not significantly impact lower extremity joint structures, while also identifying a promising, noninvasive tool to monitor astronaut musculoskeletal health on future long-duration missions.