Picture This

Cassini’s farewell to Saturn

26 November 2017 Stephen Clark

Two days before its final plunge into Saturn, the Cassini spacecraft turned its camera toward the ringed world to take a series of images for a colour mosaic, capturing a last evocative close-up until a new mission reaches the planet.

News

NuSTAR probes black hole mystery

5 November 2017 Astronomy Now

Black holes are famous for being ravenous eaters, but they do not eat everything that falls toward them. A small portion of material gets shot back out in powerful jets of hot gas, called plasma, that can wreak havoc on their surroundings. Along the way, this plasma somehow gets energized enough to strongly radiate light, forming two bright columns along the black hole’s axis of rotation.

News

NASA’s Dawn mission gears up for close look at Ceres

20 October 2017 Stephen Clark

NASA’s Dawn spacecraft will remain at Ceres for the rest of its mission, heading closer to the asteroid belt’s largest resident than ever before to obtain new measurements of ice, salts and a tenuous intermittent atmosphere detected around the dwarf planet, the space agency announced Thursday.

News

Cassini results still keeping scientists busy

19 October 2017 Stephen Clark

Scientists examining data from the Cassini mission’s final months reported this week unexpected measurements of Saturn’s gravity field and outer atmosphere, suggesting they may have to revisit theories about the planet’s rings and the forces that generate magnetic fields.