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1. What NASA's return to the moon may look like
Although an expert panel is now reviewing NASA's future plans, the agency has been developing concepts for lunar bases that could be built by 2030
Rachel Courtland 23 July 2009
2. Cosmic spokes and pummelled planets: the week in space
Fifteen years after Jupiter was pummelled by fragments of Comet Shoemaker-Levy 9, the planet has been struck again, this time by an unseen object estimated to span several football fields.
24 July 2009
3. Is Pluto a planet after all?
Poor Pluto was demoted, to the dismay of its many fans, but it could soon be returned triumphantly to full planet status
Stephen Battersby 27 July 2009
4. Pinch of comet dust lands safely on Earth
NASA celebrates the safe return of material harvested from Comet Wild 2, thought to be pristine samples of the gas and dust that formed the solar system
Hazel Muir 15 January 2006
5. Big dwarf galaxies steal small ones' stars
When two galaxies start to orbit and spin in tandem, the smallest is likely to lose all its stars due to a constant gravitational pull
29 July 2009
6. 'Astronomical unit' may need to be redefined
The standard yardstick to measure distances in the solar system will become increasingly imprecise as the Sun radiates away its energy
Ker Than 06 February 2008
7. Centuries-old sketches solve sunspot mystery
A fresh look at sunspot drawings made in the 1700s reveals flawed assumptions behind some solar activity predictions
David Shiga 30 July 2009
8. NASA attempts to reawaken Hubble
Engineers have successfully rebooted the telescope's science computer and hope to turn on its main camera in a few days
Rachel Courtland 23 October 2008
9. Moon used as giant particle detector
A growing number of astronomers are observing the moon to glimpse the first evidence of extremely energetic neutrinos
Rachel Courtland 05 August 2009
10. Mystery of Mars rover's 'carwash' rolls on
Opportunity has now had its solar panels cleaned on at least four separate occasions - NASA remain stumped as to exactly how
Philip Cohen 25 December 2004