New Horizons flyby will provide more data.
New images give sharper focus to giant asteroid; reveal Pluto and its known moons.
He enjoys clearest view of a celestial object the human eye's ever seen.
Astronaut Thomas Stafford, left, and Donald Slayton, Director of Flight Crew Operations, puff on big cigars and applaud as the Apollo 13 made a successful splashdown, April 17, 1970, Houston, Tex. Other members of the Mission Control teams surround the console. (AP Photo)
A rocket launched at 5:26 a.m. Wednesday in New Mexico.
Mark and Scott Kelly are examining the effects of prolonged space travel.
Development comes just as National Science Foundation was looking to cut ties.
OSIRIS-REx will catch up to Asteroid Bennu in 2018, return sample to Earth.
NASA's first mission to Pluto will begin sending images to Earth early next year.
This image of Jupiter shows a moon shadow on the giant planet's Great Red Spot.
It may no longer be the national observatory, but its biggest telescopes have landed new scientific projects.
The Nicaragua explosion claim was intriguing to asteroid watchers.
NASA funds five proposals for far-out projects and two are based in Tucson.
OSIRIS-REx will grab a piece of an asteroid; the Large Synoptic Survey Telescope will explore the mysteries of the universe.
This week’s big pulse of water into the long-parched Colorado River Delta will be one of the most studied water releases ever.
The ice-covered ocean of Jupiter's moon is the prime spot to look for life in our solar system, they say.
The sun-grazing comet could come back brighter than ever or fizzle out completely
Throwing flying discs into targets seems like all fun and games.
The University of Arizona's astronomy graduate students hope to persuade their department, their college and the Board of Regents to acknowledge them as astrophysicists as well as astronomers.