Astronomy Now – Page 235

Curiosity rover takes ‘selfie’ at Mojave Site on Mount Sharp

25 February 2015 Astronomy Now

A new ‘selfie’ from Curiosity shows the NASA Mars rover at work at the “Mojave” site, where its drill collected the mission’s second taste of Mount Sharp.

Cubist Saturn

24 February 2015 Astronomy Now

Sometimes at Saturn you can see things almost as if from every angle at once, the way a Cubist might imagine things.

Hubble sees pulverised planet in Beta Pictoris debris disc?

23 February 2015 Astronomy Now

Astronomers have used NASA’s Hubble Space Telescope to take the most detailed picture to date of a large, edge-on, gas-and-dust disc encircling the 20-million-year-old star Beta Pictoris, revealing what may be the pulverisation of a Mars-size body in a giant collision.

MAVEN spacecraft’s first deep dip into Martian atmosphere

21 February 2015 Astronomy Now

NASA’s MAVEN mission has just completed the first of five deep-dip manoeuvres, lowering its closest approach to Mars to just 125 kilometres (78 miles), which will yield valuable data about the upper atmosphere of the Red Planet.

Space telescopes measure speed and shape of ultra-fast quasar winds

20 February 2015 Astronomy Now

Astronomers using NASA and ESA X-ray space telescopes discover that PDS 456, an extremely bright black hole known as a quasar more than 2 billion light-years away, sustains winds that carry more energy every second than is emitted by more than a trillion suns.

New Horizons spots Pluto’s small moons

19 February 2015 Astronomy Now

Exactly 85 years after Clyde Tombaugh’s historic discovery of Pluto, NASA’s New Horizons spacecraft set to encounter the icy dwarf planet this summer is providing its first views of the small moons orbiting Pluto.

The UK under a curtain of aurora

19 February 2015 Astronomy Now

NASA astronaut Terry Virts captured this stunning image of the United Kingdom, Ireland and Scandinavia on a moonlit night beneath an amazing curtain of aurora.

Does dark matter cause mass extinctions and geologic upheavals?

19 February 2015 Astronomy Now

Research conducted at New York University suggests that the Solar System’s movement through concentrations of galactic dark matter may perturb the orbits of comets and cause additional heating in the Earth’s core, both of which could be connected with mass extinction events.

Sun’s close encounter with Scholz’s Star

18 February 2015 Astronomy Now

Astronomers using large telescopes in South Africa and Chile identify the closest known flyby of a star to our Solar System: a low-mass star system nicknamed “Scholz’s Star” that passed through the Oort Cloud 70,000 years ago.

Dawn captures sharper images of Ceres

17 February 2015 Astronomy Now

Now less than three weeks away from its historic rendezvous with dwarf planet Ceres, the latest images from NASA’s Dawn spacecraft show a myriad of craters and mysterious bright spots on the tiny world.