News – Page 85 – Astronomy Now

Voyager 1 probe fires long-dormant thrusters in interstellar space

3 December 2017 Stephen Clark

NASA’s Voyager 1 spacecraft has fired a set of four control thrusters for the first time in 37 years, giving the long-lived probe a new way to point itself on its cruise into interstellar space 13 billion miles from Earth.

Stellar motions in nearby galaxy hint at underlying dark matter

1 December 2017 Astronomy Now

By pinning down, for the first time, the three-dimensional motions of individual stars in the nearby Sculptor dwarf galaxy, astronomers have shed new light on the distribution of invisible dark matter that pervades the galaxy.

Spectroscopic survey probes uncharted depths of Hubble Ultra Deep Field

1 December 2017 Astronomy Now

Astronomers at the European Southern Observatory have conducted the deepest spectroscopic survey ever. They focused on the Hubble Ultra Deep Field, measuring distances and properties of 1600 very faint galaxies, including 72 galaxies that have never been detected before, even by Hubble itself.

Giant black hole pair photobombs Andromeda galaxy

1 December 2017 Astronomy Now

It seems like even black holes can’t resist the temptation to insert themselves unannounced into photographs. A cosmic photobomb found as a background object in images of the nearby Andromeda galaxy has revealed what could be the most tightly coupled pair of supermassive black holes ever seen.

Infant stars discovered surprisingly near galaxy’s supermassive black hole

28 November 2017 Astronomy Now

At the centre of our galaxy, in the immediate vicinity of its supermassive black hole, is a region wracked by powerful tidal forces and bathed in intense ultraviolet light and X-ray radiation. These harsh conditions, astronomers surmise, do not favour star formation, especially low-mass stars like our Sun. Surprisingly, new observations suggest otherwise.

Astronomers create most detailed radio image of nearby dwarf galaxy

28 November 2017 Astronomy Now

Astronomers at The Australian National University have created the most detailed radio image of nearby dwarf galaxy, the Small Magellanic Cloud, revealing secrets of how it formed and how it is likely to evolve.

A brightening world: Study shows rise in global light pollution

26 November 2017 Astronomy Now

Five years of advanced satellite images show that there is more artificial light at night across the globe, and that light at night is getting brighter.

Scientists suggest streaks on Martian hillsides are dry flows

26 November 2017 Stephen Clark

Intermittent flows that appear on steep slopes on Mars are likely formed by flowing sand, and not water as some scientists previously suspected, according to a new study.

An interstellar interloper is dashing through our solar system

22 November 2017 Stephen Clark

Astronomers say an object observed speeding through our solar system last month has an unexpected cigar-like shape and originated from another star, making it the first confirmed interstellar asteroid.

NASA confirms contribution to Japanese-led Mars mission

20 November 2017 Stephen Clark

NASA announced Thursday it will fund development of a scientific instrument that will fly on Japan’s Martian Moons Exploration mission, a robotic probe set for launch in 2024 to bring back the first samples from Mars’ largest moon Phobos.