News – Page 208 – Astronomy Now

4 billion-year-old meteorite reveals Mars’ darker side

1 February 2015 Astronomy Now

A new spectroscopic analysis of “Black Beauty,” a 4.4 billion-year-old meteorite found in the Moroccan desert, has given scientists a better picture of the crust beneath Mars’ red dust.

Primordial gravitational waves remain elusive

31 January 2015 Astronomy Now

Despite earlier reports of a possible detection, a joint analysis of data from ESA’s Planck satellite and the ground-based BICEP2 and Keck Array experiments has found no conclusive evidence of primordial gravitational waves.

New discoveries from Rosetta put comet 67P in focus

30 January 2015 Stephen Clark

Scientists have released new findings from the European Space Agency’s Rosetta mission, adding fresh pages to a catalog of comet data that officials promise will swell with more discoveries over the rest of the year.

Cassini catches Titan naked in the solar wind

30 January 2015 Astronomy Now

Researchers analysing data from NASA’s Cassini spacecraft were able to study the effect of a powerful solar outburst on Saturn’s largest moon, Titan, when it was unprotected from a raging stream of energetic solar particles.

The tell-tale signs of a galactic merger

29 January 2015 Astronomy Now

NGC 7714 is a spiral galaxy in the constellation Pisces that drifted too close to its companion. The gravitational interaction has twisted its spiral arms out of shape, dragged streams of material out into space, and triggered bright bursts of star formation.

Gully patterns document Martian climate cycles

29 January 2015 Astronomy Now

A new analysis of gullies carved into Martian impact craters suggests the Red Planet has undergone several ice ages in the last several million years. The driver of these climate swings is likely the planet’s wobbly axis tilt.

Citizen scientists lead astronomers to mystery objects in space

28 January 2015 Astronomy Now

Volunteers working on the Milky Way Project, one of many so-called citizen scientist activities on the crowdsourcing Zooniverse website, used web-based tools to make an interesting discovery.

Kepler astronomers discover ancient star with five Earth-size planets

27 January 2015 Astronomy Now

Researchers in the US and UK have discovered one of the oldest planetary systems in the galaxy, orbiting one of the first generation of stars that formed 11.2 billion years ago when the universe was less than 20% of its current age.

Asteroid that flew close by Earth 26th January has a moon

27 January 2015 Astronomy Now

Radar observations made with NASA’s 70-metre-wide Deep Space Network antenna at Goldstone, California yesterday show that close-approach asteroid 2004 BL86 has a small moon.

Exoplanet J1407b possesses ring system 200 times larger than Saturn’s

26 January 2015 Astronomy Now

Researchers in The Netherlands and United States show that a young giant planet or brown dwarf known as J1407b possesses a complex ring system 120 million kilometres in diameter.