Protoplanet Vesta, visited by NASA's Dawn spacecraft from 2011 to 2013, was once thought to be completely dry, incapable of retaining water because of the low temperatures and pressures at its surface. However, a new study shows evidence that Vesta may have had short-lived flows of water-mobilized material on its surface, based on data from Dawn.
"Nobody expected to find evidence of water on Vesta. The surface is very cold and there is no atmosphere, so any water on the surface evaporates," [...]
The six-member Expedition 42 crew worked Dragon cargo transfers and science on the International Space Station Wednesday.
Commander Barry Wilmore conducted botany research and harvested plants grown for the Advanced Plant Experiments-03-1 (APEX-03-1). The thale cress plants are photographed and preserved in a science freezer for analysis on the ground.
NASA astronaut Terry Virts processed samples for the Coarsening in Solid Liquid Mixtures-2 (CSLM-2) experiment, which studies the processes [...]
Blasting skyward an Atlas V rocket carrying a U.S. Navy satellite pierces a cloud bank in this starry night scene captured on January 20. On its way to orbit from Space Launch Complex 41, Cape Canaveral Air Force Station, planet Earth, the rocket streaks past brightest star Sirius, as seen from a dark beach at Canaveral National Seashore.
Above the alpha star of Canis Major, Orion the Hunter strikes a pose familiar to northern winter skygazers. Above Orion is the V-shaped Hyades star cluster [...]
A United Launch Alliance (ULA) Atlas V rocket carrying the third Mobile User Objective System satellite for the United States Navy launched from Space Launch Complex-41 on Jan. 20, 2015, at 8:04 p.m. EST.
Cape Canaveral Air Force Station, Fla., (Jan. 20, 2015) – A United Launch Alliance (ULA) Atlas V rocket carrying the third Mobile User Objective System satellite for the United States Navy launched from Space Launch Complex-41 at 8:04 p.m. EST today. The MUOS-3 spacecraft will ensure conti [...]
What causes the structure in Comet Lovejoy's tail? Comet C/2014 Q2 (Lovejoy), which is currently at naked-eye brightness and near its brightest, has been showing an exquisitely detailed ion tail. As the name implies, the ion tail is made of ionized gas -- gas energized by ultraviolet light from the Sun and pushed outward by the solar wind. The solar wind is quite structured and sculpted by the Sun's complex and ever changing magnetic field.
The effect of the variable solar wind combined with [...]
The NASA-funded Large Binocular Telescope Interferometer, or LBTI, has completed its first study of dust in the "habitable zone" around a star, opening a new door to finding planets like Earth. Dust is a natural byproduct of the planet-formation process, but too much of it can block our view of planets.
The findings will help in the design of future space missions that have the goal of taking pictures of planets similar to Earth, called exo-Earths.
The new study reports LBTI's first test [...]
Ground controllers have completed troubleshooting work after last week’s false alarm indicating an ammonia leak. Heat exchangers and thermal control systems on the U.S. side of the International Space Station have been recovered and reintegrated and are operating in excellent shape.
Commander Barry Wilmore was scrubbing cooling loops on a U.S. spacesuit when he heard an abnormally loud fan pump separator in the suit. He alerted spacesuit engineers who are currently discussing the problem on [...]