SpaceX-Polaris crew poised to attempt first private spacewalk
Polaris Dawn crew set for historic spacewalk Thursday
Watch SpaceX Polaris Dawn astronauts conduct 1st private spacewalk early Sept. 12
Giant bubbles on the surface of a nearby star preview the fate of our sun
Russia launches NASA astronaut and 2 cosmonauts to space station
A Soyuz craft with 2 Russians and 1 American docks at the International Space Station
Brazil's Lula pledges to finish paving road that experts say could worsen Amazon deforestation
Spacewalking is the new domain of the rich as billionaire attempts first private spacewalk
