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Categories: Physics: Acoustics and Ultrasound, Space: The Solar System

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A close study of auroras has revealed new ways of understanding the physics of explosive energy releases in space.

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Astronomers have made several discoveries that expand the range and value of a future Pluto orbiter mission. The breakthroughs define a fuel-saving orbital tour and demonstrate that an orbiter can continue exploration in the Kuiper Belt after surveying Pluto.

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A new study based on data from the final orbits last year of NASA's Cassini spacecraft shows the rings of Saturn -- some of the most visually stupendous objects in the universe -- are far more chemically complicated than previously was understood.

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On the hunt for distant worlds, researchers have identified an exomoon candidate around the transiting exoplanet Kepler-1625b that indicates the presence of a previously unknown gas-giant moon.

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Astronomers have discovered a new extremely distant object far beyond Pluto with an orbit that supports the presence of an even-farther-out, Super-Earth or larger Planet X.

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Scientists have studied an unusual pair of asteroids and discovered that their existence points to an early planetary rearrangement in our solar system.

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The reason Pluto lost its planet status is not valid, according to new research.

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Using data from NASA's Kepler Space Telescope, an international team has discovered a new exoplanet twice the size of Earth. It orbits its star every six days and is thus very close to it, about 10 times closer than Mercury is to the Sun.

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The long-lived international Cassini mission has revealed a surprising feature emerging at Saturn's northern pole as it nears summertime: a warming, high-altitude vortex with a hexagonal shape, akin to the famous hexagon seen deeper down in Saturn's clouds.

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Flashes of brightness known as solar flares can be followed by coronal mass ejections that send plasma from the sun into space. These charged particles can then travel to Earth, and when they arrive they wreak havoc on Earth's magnetic field. The result can be beautiful but also destructive: auroras and geomagnetic storms. Researchers now report a method for analyzing magnetic field data that might provide better short-term forecasting of geomagnetic storms.

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Thin ribbons of purple and white light that sometimes appear in the night sky were dubbed a new type of aurora when brought to scientists' attention in 2016. But new research suggests these mysterious streams of light are not an aurora at all but an entirely new celestial phenomenon.

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Earthbound detectives rely on fingerprints to solve their cases; now astronomers can do the same, using 'light-fingerprints' instead of skin grooves to uncover the mysteries of exoplanets.

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In summer 2018 the planets Mars and Saturn are, one after the other, in opposition to Earth. During this event the planets are relatively close to Earth, allowing astronomers to observe them in greater detail. Hubble took advantage of this preferred configuration and imaged both planets to continue its long-standing observation of the outer planets in the solar system.

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Twelve new moons orbiting Jupiter have been found -- 11 'normal' outer moons, and one that they're calling an 'oddball.' Astronomers first spotted the moons in the spring of 2017 while they were looking for very distant solar system objects as part of the hunt for a possible massive planet far beyond Pluto.

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Uranus was hit by a massive object roughly twice the size of Earth that caused the planet to tilt and could explain its freezing temperatures, according to new research.

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Using mass spectrometry data from NASA's Cassini spacecraft, scientists found that large, carbon-rich organic molecules are ejected from cracks in the icy surface of Saturn's moon Enceladus. Scientists think chemical reactions between the moon's rocky core and warm water from its subsurface ocean are linked to these complex molecules.

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The planets and moons of our solar system are continuously being bombarded by particles from the sun. On the Moon or on Mercury, the uppermost layer of rock is gradually eroded by the impact of sun particles. New results show that previous models of this process are incomplete. The effects of solar wind bombardment are much more drastic than previously thought.

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Bumper car-like interactions at the edges of our solar system -- and not a mysterious ninth planet -- may explain the dynamics of strange bodies called 'detached objects,' according to a new study.

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Scientists have discovered dunes on Pluto, and say they are likely to have been formed of methane ice grains released into its rarefied atmosphere.

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Scientists integrated NASA's New Horizons discoveries with data from ESA's Rosetta mission to develop a new theory about how Pluto may have formed at the edge of our solar system.