Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
NASA does not have an overall strategy to keep its earth and space science missions on budget.
NASA Administrator Charles Bolden recently told Al-Jazeera network that one of the charges Obama gave him was "to reach out to the Muslim world."
The skies grew black in the middle of the day Sunday as the moon slipped in front of the Sun and aligned with the Earth.
The comet-chaser Rosetta transmitted its first pictures from the largest asteroid ever visited by a satellite.
Scientists lost communication with Galaxy 15 on April 5, and now they are concerned it will disrupt other satellites.
The flickering lights over our northern and southern-most skies at times seem like a mystical offering.
New research shows soft X-rays, once dismissed as interference, can help predict space storms that threaten Earth.
Finding the 'stuff of pencils' could reveal important insight into the start of life on Earth.
The image was painstakingly built up, slice by slice, by a $875 million telescope named Planck.
Scientists hope dust samples from the asteroid Itokawa could help reveal secrets about the origins of the solar system.
NASA estimates it could cost as much as $200 million a month to keep the shuttle program going beyond 2010.
Italian Northern League party leader Mario Borghezio has urged the EU to 'open the books' on UFO encounters.
The new policy envisions collaboration with other countries and with companies on new initiatives.
Aerospace giant hopes its new CST-100 capsule will replace retiring space shuttles.
Experts debate the use of nuclear weapons to deter an Earth-killing asteroid.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.