Astronomy
PASADENA, Calif. - For the past three years, Robert Nelson has been juggling two lives.
COPENHAGEN - The question is a potential deal-killer: If nations ever agree to slash greenhouse gas emissions, how will the world know if they live up to their pledges?
The answer is in space, experts say - both outer space and cyberspace.
WASHINGTON - The refurbished Hubble Space Telescope has spotted the oldest galaxies yet, scientists reported Tuesday.
LOS ANGELES - NASA's latest space telescope will scan the sky in search of never-before-seen asteroids, comets, stars and galaxies, with one of its main tasks to catalog objects posing a danger to Earth.
BEIJING - China is set to launch its second lunar probe next October in preparation for an unmanned moon landing by the end of 2012, space program officials were quoted Friday as saying.
