News – Page 146 – Astronomy Now

27 August 2026

A new view of the X-ray sky

26 March 2016 Astronomy Now

In the 1990s, the ROSAT X-ray satellite performed the first deep all-sky survey. Scientists at the Max Planck Institute for Extraterrestrial Physics (MPE) have revisited the all-sky survey, publishing an extended “2RXS catalogue” — the deepest and cleanest X-ray all-sky survey to date.

Magnetar could have boosted explosion of extremely bright supernova

25 March 2016 Astronomy Now

Super-luminous supernovae (SLSNe) are a relatively new and rare class of stellar explosions, 10 to 100 times brighter than normal supernovae. According to a new model, researchers have found that highly magnetised, rapidly spinning neutron stars called magnetars could explain the energy source behind SLSNe.

Dark comet’s flyby of Earth observed with radar and infrared

25 March 2016 Astronomy Now

Astronomers were watching when comet P/2016 BA14 flew close by Earth on 22 March at a distance of slightly more than nine times the distance of the Moon. Radar images from the flyby indicate that the body is about a kilometre in diameter, while infrared spectra indicate that the comet’s nucleus is as dark as fresh asphalt.

Moons of Saturn may be younger than the dinosaurs

25 March 2016 Astronomy Now

New research suggests that some of Saturn’s icy moons, as well as its famous rings, might be modern adornments. Their dramatic birth may have taken place a mere 100 million years ago. This would date the formation of the major moons of Saturn, with the exception of more distant Titan and Iapetus, to the relatively recent Cretaceous Period — the era of the dinosaurs.

Cassini spies Titan’s tallest peaks

24 March 2016 Astronomy Now

By convention, mountains on Saturn’s largest moon, Titan, are named for mountains from Middle-earth, the fictional setting in fantasy novels by J.R.R. Tolkien. Unfortunately for “Lord of the Rings” fans, Titan’s highest peak is not Doom Mons, but a trio of ridges known as Mithrim Montes, where the tallest peak is 10,948 feet (3,337 metres) high.

Dawn sees Ceres’ salty spot

24 March 2016 Keith Cooper

The Dawn spacecraft has finally been able to get a good look at the famous bright spot on the surface of Ceres, with NASA releasing new images at the Lunar and Planetary Science Conference in Texas.

New research shows quasars slowed pace of star formation

24 March 2016 Astronomy Now

Galaxies reached their busiest star-making pace about 11 billion years ago, then slowed down. Scientists have puzzled for years over the question of what happened. Now researchers have found evidence supporting the argument that the answer was energy feedback from quasars within the galaxies where stars are born.

A new way to determine the age of stars?

24 March 2016 Astronomy Now

Researchers have developed a new conceptual framework for understanding how stars similar to our Sun evolve. Their framework helps explain how the rotation of stars, their emission of X-rays, and the intensity of their stellar winds vary with time. Their work could ultimately help to determine the age of stars more precisely than is currently possible.

Ancient lunar polar ice reveals tilting of Moon’s axis

23 March 2016 Astronomy Now

Did the “Man in the Moon” look different from ancient Earth? New NASA-funded research provides evidence that the spin axis of the Moon shifted by about five degrees roughly three billion years ago. The evidence of this motion is recorded in the distribution of ancient lunar ice, evidence of delivery of water to the early solar system.

First discovery of a binary companion for a Type Ia supernova

23 March 2016 Astronomy Now

A team of astronomers has detected a flash of light from the companion star to supernova 2012cg that lies in the edge-on spiral NGC 4424, 50 million light-years away in the constellation Virgo. This is the first time that the impact of an exploding star on its neighbour has been witnessed.