January 2015 – Astronomy Now

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.

1st Feb: see the Moon occult λ Geminorum

31 January 2015 Ade Ashford

The current monthly cycle featuring occultations of naked-eye star Lambda Geminorum continues with an early evening event for the British Isles on Sunday, 1st February.

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.

Moon meets Aldebaran in the evening sky

28 January 2015 Ade Ashford

On the evening of Thursday, 29 January the Moon has a close brush with bright star Aldebaran in Taurus. If you have a clear sky, grab your binoculars and enjoy the view.

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.

Farewell, until the next time, 2004 BL86: a personal view

27 January 2015 Ade Ashford

Clear skies in eastern England during the night of 26th/27th January enabled this fortunate observer to take a good look at and photograph asteroid 2004 BL86 during its close approach to Earth.