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Categories: Physics: Acoustics and Ultrasound, Space: The Solar System
Published New tool could predict large solar storms more than 24 hours in advance
(via sciencedaily.com) Large magnetic storms from the Sun, which affect technologies such as GPS and utility grids, could soon be predicted more than 24 hours in advance.
Published What our solar system looked like as a ‘toddler’
(via sciencedaily.com) Astronomers have identified a young planetary system which may aid in understanding how our own solar system formed and developed billions of years ago.
Published Mercury's magnetic field is almost four billion years old
(via sciencedaily.com) New data from MESSENGER, the spacecraft that orbited Mercury for four years before crashing into the planet a week ago, reveals Mercury's magnetic field is almost four billion years old.
Published NASA Completes MESSENGER Mission with Expected Impact on Mercury's Surface
(via sciencedaily.com) A NASA planetary exploration mission came to a planned, but nonetheless dramatic, end April 30 when it slammed into Mercury's surface at about 8,750 mph and created a new crater on the planet's surface.
Published New exoplanet too big for its star challenges ideas about how planets form
(via sciencedaily.com) The discovery of a strange exoplanet orbiting very close to a small cool star 500 light years away is challenging ideas about how planets form.
Published Unmasking the secrets of Mercury, in color
(via sciencedaily.com) The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the solar system's innermost planet. MESSENGER's highly successful orbital mission is about to come to an end, as the spacecraft runs out of propellant and the force of solar gravity causes it to impact the surface of Mercury near the end of April 2015.
Published Can sound help us detect 'earthquakes' on Venus?
(via sciencedaily.com) Detecting an 'earthquake' on Venus would seem to be an impossible task. But conditions in Venus' atmosphere are much more hospitable, and it is here that researchers hope to deploy an array of balloons or satellites that could detect Venusian seismic activity -- using sound.
Published Small solar eruptions can have profound effects on unprotected planets
(via sciencedaily.com) While no one yet knows what's needed to build a habitable planet, it's clear that the interplay between the sun and Earth is crucial for making our planet livable -- a balance between a sun that provides energy and a planet that can protect itself from the harshest solar emissions.
Published Comet dust: Planet Mercury's 'invisible paint'
(via sciencedaily.com) Scientists have long puzzled over the planet Mercury's excessively dark surface. New research suggests that carbon from passing comets could be the planet's mystery darkening agent.
Published Unexplained warm layer discovered in Venus' atmosphere
(via sciencedaily.com) Scientists have found a warm layer in Venus' atmosphere, the nature of which is still unknown. The researchers made the discovery when compiling a temperature map of the upper atmosphere on the planet's night side based on the data collected by the Venus Express probe.
Published Explosions of Jupiter's aurora linked to extraordinary planet-moon interaction
(via sciencedaily.com) New observations of the planet's extreme ultraviolet emissions show that bright explosions of Jupiter's aurora likely also get kicked off by the planet-moon interaction, not by solar activity.
Published Wandering Jupiter accounts for our unusual solar system
(via sciencedaily.com) Jupiter may have swept through the early solar system like a wrecking ball, destroying a first generation of inner planets before retreating into its current orbit, according to a new study. The findings help explain why our solar system is so different from the hundreds of other planetary systems that astronomers have discovered in recent years.
Published MESSENGER's endgame: Hover campaign promises bird's-eye view of Mercury's surface
(via sciencedaily.com) MESSENGER will not go gentle into that good night. The mission will end sometime this spring, when the spacecraft runs out of propellant and the force of solar gravity causes it to impact the surface of Mercury. But the team initiated a "hover" observation campaign designed to gather scientific data from the planet at ultra-low altitudes until the last possible moment. Engineers have devised a series of orbit-correction maneuvers (OCMs) over the next five weeks -- the first of which was carried out today -- designed to delay the inevitable impact a bit longer.
Published Mercury: Results from Messenger’s low-altitude campaign
(via sciencedaily.com) NASA's MESSENGER mission, now nearing the end of its fourth and final year of orbital operations at Mercury, is well into a low-altitude campaign that is returning images and measurements of the planet's surface and interior that are unprecedented in their resolution.
Published New Mercury surface composition maps illuminate the planet's history
(via sciencedaily.com) Scientists have created global-scale maps of Mercury's surface chemistry that reveal previously unrecognized geochemical terranes -- large regions that have compositions distinct from their surroundings. The presence of these large terranes has important implications for the history of the planet
Published Venus, if you will, as seen in radar with the Green Bank Telescope
(via sciencedaily.com) Recently, by combining the highly sensitive receiving capabilities of the National Science Foundation's Green Bank Telescope and the powerful radar transmitter at the NSF's Arecibo Observatory, astronomers were able to make remarkably detailed images of the surface of Venus without ever leaving Earth.
Published NASA spacecraft becomes first to orbit a dwarf planet
(via sciencedaily.com) NASA's Dawn spacecraft has become the first mission to achieve orbit around a dwarf planet. The spacecraft was approximately 38,000 miles (61,000) kilometers from Ceres when it was captured by the dwarf planet's gravity at about 4:39 a.m. PST (7:39 a.m. EST) Friday.
Published Ancient star system reveals Earth-sized planets forming near start of universe
(via sciencedaily.com) A Sun-like star with orbiting planets, dating back to the dawn of the Galaxy, has been discovered by an international team of astronomers. At 11.2 billion years old, it is the oldest star with Earth-sized planets ever found and proves that such planets have formed throughout the history of the Universe.
Published New research re-creates planet formation, super-Earths and giant planets in the laboratory
(via sciencedaily.com) New laser-driven compression experiments reproduce the conditions deep inside exotic super-Earths and giant planet cores, and the conditions during the violent birth of Earth-like planets, documenting the material properties that determined planets' formation and evolution processes.
Published Dawn spacecraft delivers new image of dwarf planet Ceres
(via sciencedaily.com) As NASA's Dawn spacecraft closes in on Ceres, new images show the dwarf planet at 27 pixels across, about three times better than the calibration images taken in early December. These are the first in a series of images that will be taken for navigation purposes during the approach to Ceres.