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Topic: Alan Stern
Private company to offer rides to moon by 2020
Golden Spike says it hopes to sell missions to the moon for over $1 billion.
Price of a vacation on the moon? $1.5 billion.
Do Pluto's moons pose risks for NASA spacecraft? (+video)
Fifth moon discovery reminds us how little we know about Pluto (+video)
Pluto's fifth moon: five fascinating facts (+video)
Pluto now has at least five moons. Can we go back to calling it a planet?
Pluto's new moon could cause problems for space probe, says NASA (+video)
What should we name Pluto's new moon?
Hubble telescope spots fifth moon orbiting Pluto (+video)
Florida scientists reduced to holding bake sale to fund NASA
Pluto moon discovery hints at future surprises for NASA probe
After the space shuttle, astronaut corps awaits a new mission
Should Pluto be restored as a planet? Experts weigh in.
Across the Milky Way, more planet Earths?
U.S. budget boosts coal and nuclear power
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