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Categories: Geoscience: Geomagnetic Storms, Space: The Solar System
Published Largest potentially hazardous asteroid detected in eight years
(via sciencedaily.com) Twilight observations have enabled astronomers to spot three near-Earth asteroids (NEA) hiding in the glare of the Sun. These NEAs are part of an elusive population that lurks inside the orbits of Earth and Venus. One of the asteroids is the largest object that is potentially hazardous to Earth to be discovered in the last eight years.
Published NASA's InSight lander detects stunning meteoroid impact on Mars
(via sciencedaily.com) NASA's InSight lander recorded a magnitude 4 marsquake last Dec. 24, but scientists learned only later the cause of that quake: a meteoroid strike estimated to be one of the biggest seen on Mars since NASA began exploring the cosmos. What's more, the meteoroid excavated boulder-size chunks of ice buried closer to the Martian equator than ever found before -- a discovery with implications for NASA's future plans to send astronauts to the Red Planet.
Published Scientists use deep planetary scan to confirm Martian core
(via sciencedaily.com) Seismologists have developed a new method to scan the deep interior of planets in our solar system to confirm whether they have a core at the heart of their existence.
Published Magma on Mars likely
(via sciencedaily.com) Until now, Mars has been generally considered a geologically dead planet. An international team of researchers now reports that seismic signals indicate vulcanism still plays an active role in shaping the Martian surface.
Published Traces of ancient ocean discovered on Mars
(via sciencedaily.com) Original source A recently released set of topography maps provides new evidence for an ancient northern ocean on Mars. The maps offer the strongest case yet that the planet once experienced sea-level rise consistent with an extended warm and wet climate, not the harsh, frozen landscape that exists today.
Published Tree rings offer insight into devastating radiation storms
(via sciencedaily.com) A new study has shed new light on a mysterious, unpredictable and potentially devastating kind of astrophysical event.
Published Researchers create lunar regolith bricks that could be used to construct Artemis base camp
(via sciencedaily.com) As part of NASA's Artemis program to establish a long-term presence on the moon, it aims to build an Artemis base camp that includes a modern lunar cabin, rover and mobile home. This fixed habitat could potentially be constructed with bricks made of lunar regolith and saltwater, thanks to a recent discovery.
Published Balancing risk and reward in planetary exploration
(via sciencedaily.com) Original source Researchers have developed a new approach to balancing the risks and scientific value of sending planetary rovers into dangerous situations.
Published Ancient bacteria might lurk beneath Mars' surface
(via sciencedaily.com) Scientists found that ancient bacteria could survive close to the surface on Mars much longer than previously assumed. So, if life did, in fact, evolve when the last waters flowed on Mars, it would likely still be there today -- billions of years later.
Published Discovery could dramatically narrow search for space creatures
(via sciencedaily.com) An Earth-like planet orbiting an M dwarf -- the most common type of star in the universe -- appears to have no atmosphere at all. This discovery could cause a major shift in the search for life on other planets.
Published Looking to move to a galaxy far, far away? Innovative system evaluates habitability of distant planets
(via sciencedaily.com) The research framework developed, along with observational data from the Webb Space Telescope, will enable scientists to efficiently assess the atmospheres of many other planets without having to send a space crew to visit them physically. This will help us make informed decisions in the future about which planets are good candidates for human settlement and perhaps even to find life on those planets.
Published Scientists compile Cassini's unique observations of Saturn's rings
(via sciencedaily.com) Scientists have compiled 41 solar occultation observations of Saturn's rings from the Cassini mission. The compilation will inform future investigations of the particle size distribution and composition of Saturn's rings, key elements to understanding their formation and evolution.
Published NASA's Lucy to fly past thousands of objects for Earth gravity assist
(via sciencedaily.com) Mission engineers will track NASA's Lucy spacecraft nonstop as it prepares to swoop near Earth on Oct. 16 to use this planet's gravity to set itself on a course toward the Jupiter Trojan asteroids.
Published New abiotic pathway for the formation of oxygen
(via sciencedaily.com) Researchers have now found evidence that double ionised sulphur dioxide contribute to the formation of oxygen molecules. This could, in particular, explain the presence of oxygen in sulphur dioxide-rich atmospheres of several of Jupiter's moons.
Published Broccoli gas: A better way to find life in space
(via sciencedaily.com) Broccoli, along with many other plants and microorganisms, emit gases to help them expel toxins. Scientists believe these gases could provide compelling evidence of life on other planets.
Published Astronomers find a 'cataclysmic' pair of stars with the shortest orbit yet
(via sciencedaily.com) Astronomers have discovered a stellar binary, or pair of stars, with an extremely short orbit, appearing to circle each other every 51 minutes. The system seems to be one of a rare class of binaries known as a 'cataclysmic variable,' in which a star similar to our sun orbits tightly around a white dwarf -- a hot, dense core of a burned-out star.
Published Collision may have formed the Moon in mere hours, simulations reveal
(via sciencedaily.com) Most theories claim the Moon formed out of the debris of a collision between the Earth and an object about the size of Mars, called Theia, coalescing in orbit over months or years. A new simulation puts forth a different theory -- the Moon may have formed immediately, in a matter of hours, when material from the Earth and Theia was launched directly into orbit after the impact.
Published Exploring Jupiter's moon, Europa, possible with silicon-germanium transistor technology
(via sciencedaily.com) Europa is more than just one of Jupiter's many moons -- it's also one of most promising places in the solar system to look for extraterrestrial life. Under 10 kilometers of ice is a liquid water ocean that could sustain life. But with surface temperatures at -180 Celsius and with extreme levels of radiation, it's also one of the most inhospitable places in the solar system. Exploring Europa could be possible in the coming years thanks to new applications for silicon-germanium transistor technology research.
Published Potential first traces of the universe's earliest stars
(via sciencedaily.com) Original source Astronomers may have discovered the ancient chemical remains of the first stars to light up the Universe. Using an innovative analysis of a distant quasar observed by the 8.1-meter Gemini North telescope on Hawai'i, the scientists found an unusual ratio of elements that, they argue, could only come from the debris produced by the all-consuming explosion of a 300-solar-mass first-generation star.
Published Lunar glass shows Moon asteroid impacts mirrored on Earth
(via sciencedaily.com) A research team has found asteroid impacts on the Moon millions of years ago coincided precisely with some of the largest meteorite impacts on Earth, such as the one that wiped out the dinosaurs.