Solar System – Page 9 – Astronomy Now

ALMA investigates ‘DeeDee,’ a distant, dim member of our Solar System

17 April 2017 Astronomy Now

Using the Atacama Large Millimeter/submillimeter Array, astronomers have revealed extraordinary details about a recently discovered far-flung member of our Solar System, the planetary body 2014 UZ224, more informally known as DeeDee.

Saturn’s disc-shaped moon Atlas spotted by Cassini

16 April 2017 Stephen Clark

One of Saturn’s peculiar moons has received an up-close look from NASA’s Cassini spacecraft, which sent back the best-ever pictures of Atlas, an object shaped like a flying saucer orbiting just outside the planet’s rings.

New discoveries raise prospects for life on moons of Jupiter and Saturn

13 April 2017 Stephen Clark

Scientists announced Thursday that measurements from NASA’s Cassini spacecraft detected hydrogen gas, a key energy source for microbial life, in a plume gushing from a vast liquid water ocean buried beneath the icy shell of Saturn’s moon Enceladus.

Ceres’ temporary atmosphere linked to solar activity

7 April 2017 Astronomy Now

Scientists have long thought that Ceres may have a very weak, transient atmosphere, but mysteries lingered about its origin and why it’s not always present. Now, researchers suggest that this temporary atmosphere appears to be related to the behaviour of the Sun, rather than Ceres’ proximity to the Sun.

Hubble takes up-close portrait of Jupiter

7 April 2017 Astronomy Now

On April 3, 2017, as Jupiter made its nearest approach to Earth in a year, NASA’s Hubble Space Telescope viewed the solar system’s largest planet in all of its up-close glory.

Juno orbiter races by Jupiter on fourth science pass

28 March 2017 Stephen Clark

NASA’s Juno spacecraft sailed over Jupiter’s cloud tops early Monday, the fourth time the solar-powered probe has approached the giant planet and collected science data since its arrival last July 4.

MAVEN data show thinning atmosphere drove the drying and cooling of Mars

28 March 2017 Stephen Clark

Data collected by NASA’s MAVEN spacecraft in its first two years at Mars confirm suspicions that the solar wind is blasting away the planet’s atmosphere and helped transform the world from a warmer, wetter and potentially habitable world into the barren landscape seen today, scientists said.

Rosetta’s comet shows scars from swing through inner solar system

23 March 2017 Stephen Clark

Scientists examining imagery from Europe’s Rosetta spacecraft have logged numerous changes to the face of comet 67P/Churyumov-Gerasimenko, from collapsing cliffs to a growing crack through the comet’s neck that could foretell the eventual unraveling of the city-sized icy world.

Europe’s ExoMars spacecraft begins lowering its orbit

20 March 2017 Stephen Clark

The ExoMars Trace Gas Orbiter, a Russian-launched, European-built spacecraft that arrived at Mars in October, is starting to dip into the upper reaches of the red planet’s atmosphere in a year-long “aerobraking” campaign place the observatory in the right position to hunt for methane, an indicator of potential biological activity.

Perils and discoveries lie ahead for long-lived Saturn orbiter

14 March 2017 Stephen Clark

Scientists are bracing for a blitz of discoveries in the last six months of Cassini’s mission at Saturn, when the plutonium-powered robot will repeatedly ram through an unexplored gap in the planet’s famous rings, then make a destructive plunge into the atmosphere in September.