Topic: John Grunsfeld

Obama's NASA budget: Mars takes a hit, but space science isn't dead

Two major Mars missions lost out to the James Web Space Telescope in Obama's proposed NASA budget, but there's still money for other ambitious space-science missions.

NASA to exchange 'flagship' missions for small-ball projects (+video)

NASA is drastically scaling back its Mars exploration initiatives in exchange for smaller, more efficient missions, agency officials say. 

NASA's next big-ticket telescope showcased in New York City

A mockup of the James Webb Space Telescope, billed as the successor to the Hubble Space Telescope, took center stage at New York's World Science Festival.

Hubble telescope glimpses universe's earliest galaxies

New Hubble telescope images provide a look at the cosmos when it was just 600 to 800 million years old. Galaxies from this period might have helped transform the universe from dark to light.

Atlantis astronauts stay in orbit; dream of pizza

Final spacewalk leaves like-new Hubble ready for its final bow

Astronauts made all the needed repairs, giving the telescope five to 10 more years of life.

NASA's Mr. Fixits give Hubble Space Telescope life-prolonging hardware

One small (space) step for Hubble

Astronauts make a giant leap toward repairing the telescope in the first of five spacewalks.

Space shuttle grapples Hubble; dances with a star

Shuttle's risky mission to repair Hubble

With custom-made tools and a rescue plan, the seven-member crew of the Atlantis aim to upgrade the iconic telescope.