An asteroid nearly two miles (three kilometers) wide is set to pass by Earth Friday with no risk of impact, offering scientists a rare chance to study a massive flying object with its own moon.
The United States will scale back Mars exploration under a proposed budget by President Barack Obama released Monday that has some scientists fuming over the risk of a NASA brain-drain.
As the world marvels at the latest US Mars landing, a Dutch start-up is aiming to beat NASA at its own game by sending the first humans to the red planet -- and film all as a reality show.
A massive asteroid will make a rare fly-by Tuesday, and although it poses no danger of crashing to Earth, US scientists said this week they are looking forward to getting a closer look.
The biggest, baddest space rover ever built for exploring an alien planet is nearing its August 6 landing on Mars, and the US space agency is anxious for success despite huge risks.
Men walked on the Moon, but women will be among the pioneering explorers who someday step foot on Mars, said a gathering of top female space experts this week.
The US space agency on Wednesday denied a claim made in a scientific study that its Voyager 1 spacecraft had left the solar system, describing the report as "premature."
About 36 hours after NASA landed its $2.5 billion rover on Mars, it released Tuesday what it jokingly dubbed a "crime scene" aerial shot of where the parachute, heat shield and vehicle came down.
The US space agency has narrowed its hunt for an asteroid to capture to three, NASA said Wednesday.
At sunrise in some parts of China and Japan and by sunset in the western United States, a partial solar eclipse is set to slink across a narrow swath of the Earth on May 20 and 21.