Space
2013 Smart Guide: Supercomet to outshine the moon
A gas cloud crashing into the black hole at the centre of the galaxy and a naked-eye comet promise celestial fireworks in 2013
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A gas cloud crashing into the black hole at the centre of the galaxy and a naked-eye comet promise celestial fireworks in 2013
The orbit of a binary star system is changing so quickly due to gravitational waves that you could measure it with your wristwatch