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Categories: Geoscience: Volcanoes, Space: The Solar System
Published Ocean currents predicted on Saturn's moon Enceladus
(via sciencedaily.com) New research could inform where to one day search for signs of life on Saturn's moon Enceladus.
Published The case of the cloudy filters: Solving the mystery of the degrading sunlight detectors
(via sciencedaily.com) Original source Sun-facing satellites monitor the Sun's ultraviolet (UV) light to give us advance warning of solar storms. But over the course of just a year or two, the metal filters in the detectors mysteriously lose their ability to transmit UV light. Now, scientists have found the first evidence indicating that carbonization is not the problem.
Published Powerful stratospheric winds measured on Jupiter
(via sciencedaily.com) Astronomers have now directly measured winds in Jupiter's middle atmosphere. By analyzing the aftermath of a comet collision from the 1990s, the researchers have revealed incredibly powerful winds, with speeds of up to 1450 kilometers an hour, near Jupiter's poles. They could represent a 'unique meteorological beast in our Solar System'.
Published Jupiter's Great Red Spot feeds on smaller storms
(via sciencedaily.com) The stormy, centuries-old maelstrom of Jupiter's Great Red Spot was shaken but not destroyed by a series of anticyclones that crashed into it over the past few years, according to a new study.
Published Jupiter's 'dawn storm' auroras are surprisingly Earth-like
(via sciencedaily.com) The midnight births of the dramatic bright surges in Jupiter's aurora known as dawn storms are captured in a new study of data from the Juno space probe.
Published Distant planet may be on its second atmosphere
(via sciencedaily.com) Scientists have found evidence that a planet orbiting a distant star may have lost its atmosphere but gained a second one through volcanic activity.
Published Engineers propose solar-powered lunar ark as 'modern global insurance policy'
(via sciencedaily.com) Researchers are taking scientific inspiration from an unlikely source: the biblical tale of Noah's Ark. Rather than two of every animal, however, his solar-powered ark on the moon would store cryogenically frozen seed, spore, sperm and egg samples from 6.7 million Earth species. The proposed structure would be built within the moon's enormous, underground lava tubes, which have been untouched for billions of years.
Published The aurora's very high altitude booster
(via sciencedaily.com) Electrons arriving from the Sun are propelled by electrical energy generated as high as 30,000 kilometers above Earth, ultimately creating the dazzling displays of the northern and southern lights.
Published Establishing the origin of solar-mass black holes and the connection to dark matter
(via sciencedaily.com) Original source What is the origin of black holes and how is that question connected with another mystery, the nature of dark matter? Dark matter comprises the majority of matter in the Universe, but its nature remains unknown.
Published Source of hazardous high-energy particles located in the Sun
(via sciencedaily.com) In the new study, researchers analyzed the composition of solar energetic particles heading towards Earth, and found they had the same 'fingerprint' as plasma located low in the Sun's corona, close to the middle region of the Sun's atmosphere, the chromosphere.
Published Comet makes a pit stop near Jupiter's asteroids
(via sciencedaily.com) After traveling several billion miles toward the Sun, a wayward young comet-like object orbiting among the giant planets has found a temporary parking place along the way. The object has settled near a family of captured ancient asteroids, called Trojans, that are orbiting the Sun alongside Jupiter. This is the first time a comet-like object has been spotted near the Trojan population.
Published Apollo rock samples capture key moments in the Moon's early history
(via sciencedaily.com) Volcanic rock samples collected during NASA's Apollo missions bear the isotopic signature of key events in the early evolution of the Moon, a new analysis found. Those events include the formation of the Moon's iron core, as well as the crystallization of the lunar magma ocean -- the sea of molten rock thought to have covered the Moon for around 100 million years after the it formed.
Published Parker Solar Probe offers stunning view of Venus
(via sciencedaily.com) NASA's Parker Solar Probe captured stunning views of Venus during its close flyby of the planet in July 2020. For more insight, the WISPR team planned a set of similar observations of the Venusian nightside during Parker Solar Probe's latest Venus flyby on Feb. 20, 2021. Mission team scientists expect to receive and process that data for analysis by the end of April.
Published Scientists image a bright meteoroid explosion in Jupiter's atmosphere
(via sciencedaily.com) From aboard the Juno spacecraft, an instrument observing auroras serendipitously spotted a bright flash above Jupiter's clouds last spring. The Ultraviolet Spectrograph (UVS) team studied the data and determined that they had captured a bolide, an extremely bright meteoroid explosion in the gas giant's upper atmosphere.
Published On the quest for other Earths
(via sciencedaily.com) An international research team has developed a new method for directly imaging smaller planets in the habitable zone of a neighboring star system. This opens up new possibilities in the search for extraterrestrial life.
Published Scientist proposes a new timeline for Mars terrains
(via sciencedaily.com) A scientist has updated Mars chronology models to find that terrains shaped by ancient water activity on the planet's surface may be hundreds of millions of years older than previously thought. This new chronology for Mars, based on the latest dynamical models for the formation and evolution of the solar system, is particularly significant as the days count down until NASA's Mars 2020 Perseverance rover lands on the Red Planet on February 18, 2021.
Published Astronomers confirm solar system’s most distant known object is indeed Farfarout
(via sciencedaily.com) Astronomers have confirmed that a faint object discovered in 2018 and nicknamed 'Farfarout' is indeed the most distant object yet found in our Solar System. The object has just received its designation from the International Astronomical Union.
Published Thick lithosphere casts doubt on plate tectonics in Venus's geologically recent past
(via sciencedaily.com) A study of a giant impact crater on Venus suggests that its lithosphere was too thick to have had Earth-like plate tectonics, at least for much of the past billion years.
Published Purported phosphine on Venus more likely to be ordinary sulfur dioxide
(via sciencedaily.com) Astronomers revisited and comprehensively reinterpreted the radio telescope observations underlying a widely reported 2019 claim that phosphine gas was present in the atmosphere of Venus. In a paper accepted to the Astrophysical Journal, they report that sulfur dioxide, a common gas in the atmosphere of Venus, is likely what was detected instead of phosphine.
Published Puzzling six-exoplanet system with rhythmic movement challenges theories of how planets form
(via sciencedaily.com) Using a combination of telescopes, including the Very Large Telescope of the European Southern Observatory (ESO's VLT), astronomers have revealed a system consisting of six exoplanets, five of which are locked in a rare rhythm around their central star. The researchers believe the system could provide important clues about how planets, including those in the Solar System, form and evolve.