Monday, March 15, 2004
Scientists have found our 10th planet
Scientists have found a new world orbiting the solar system – more than 3 billion kilometres further away from the Sun than Pluto and 40 years away from Earth in a space shuttle.
NASA is expected to announce today the discovery of the space object, which some experts believe could be a new planet.
It is provisionally known as Sedna, after the Inuit goddess of the sea.
The discovery of Sedna – 10 billion kilometres from Earth – is a testament to the new generation of high-powered telescopes.
Measurements suggest Sedna's diameter is almost 2000km – the biggest find in the solar system since Pluto was discovered 74 years ago. It is believed to be made of ice and rock, and is slightly smaller than Pluto.
The find will reignite the debate over what constitutes a planet.
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