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Pluto added to official "minor planet" list

7 September 2006

The former planet will henceforth be known as minor planet 134340 Pluto, underscoring its recent demotion from planethood

Star pair masquerades as a planetary system

7 September 2006

A deceptive looking duo of low-mass stars, revealed by Hubble, will add to the heated debate over what constitutes a planet

Feedback

6 September 2006

Pluto is down but not out

2 September 2006

The decision to relegate Pluto from planet to "dwarf planet" was a wrench for astronomers, but there's no need for a tearful farewell, says Stephen Battersby

Rows over planetary status are as old as the asteroids

2 September 2006

Even as you mourn Pluto's demotion from planet, spare a thought for poor old Ceres, which has twice battled to attain planetary status

Astronomers plot to overturn planet definition

31 August 2006

Several hundred researchers have signed a petition to do away with the new definition, which strips Pluto of its status as a planet

Pluto is down but not out

30 August 2006

The decision to relegate Pluto from planet to "dwarf planet" was a wrench for astronomers, but there's no need for a tearful farewell, says Stephen Battersby

Soundbites

30 August 2006

Rows over planetary status are as old as the asteroids

30 August 2006

Even as you mourn Pluto's demotion from planet, spare a thought for poor old Ceres, which has twice battled to attain planetary status

New planet definition sparks furore

25 August 2006

Some astronomers say the Earth and three other planets fail to meet the criteria of the new definition, which was decided by just 4% of eligible voters