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Screen shot of the Time Traveller twitter screen

Testing the time travellers

A question that began over a poker game, turned into a call for time travellers from the future to make themselves known.

False-colour image of star HD 4230

Lone star has two planets

A new giant planet, perhaps twice the mass of Jupiter, has been located in a star system about 250 light-years from Earth.

This image shows the remnant of Supernova 1987A

A stellar dust factory

A giant supernova seen in 1987 is producing the kind of dust that fills many galaxies.

Artist's impression of an exoplanet

Five new rocky planets discovered

Astronomers have announced the discovery of another handful of planets as they work on expanding the galactic planetary census.

artist's impression shows a disc of dust and gas surrounding a star

Some stars have split personalities

Astronomers know that about half of all Sun-like stars belong to multiple-star systems, but have debated over how such systems are formed.

Artist's view of exoplanet GJ 1214b

Cloudy weather on an alien world

Weather forecasters on exoplanet GJ 1214b would have an easy job. Today’s forecast: cloudy. Tomorrow: overcast. Extended outlook: more clouds.

Artist's concept of MAVEN

NASA Mars mission set for launch

The Mars Atmosphere and Volatile Evolution (MAVEN) mission aims to find out why Mars lost most of its atmosphere.

Antennae of the MWA backlit by the Sun

Australian telescope to reveal early universe

The $51 million Murchison Widefield Array radio telescope has begun operations in Australia’s outback.

The projected motion of the red dwarf star Proxima Centauri

Close encounter could reveal planets

Observations of the nearest star to our Solar System might uncover the presence of Earth-sized planets.

SOHO image of a CME

Sun sends an explosion our way

Billions of tonnes of particles were ejected by the Sun two days ago. Some were expected to reach Earth today.