El nuevo satélite educativo de la ESA da un gran paso

El nuevo satélite educativo de la ESA da un gran paso

Luca a Star City

Luca a Star City

U.S. Department of Defense Armed with Science Update

U.S. Department of Defense Armed with Science Update

Viaggio nella fabbrica dei razzi spaziali.

Viaggio nella fabbrica dei razzi spaziali.

ESA's werkpaard drijvende kracht achter NASA's Orion-ruimteschip

ESA's werkpaard drijvende kracht achter NASA's Orion-ruimteschip

Un día en la vida de Venus Express

Un día en la vida de Venus Express

Bételgeuse se prépare à une collision

Bételgeuse se prépare à une collision

ROBONAUT 2 TRAINING TO BE PART OF THE SPACE CREW

FROM: NASA

Robonaut Operates Task Board in Space
In the International Space Station's Destiny laboratory, Robonaut 2 is pictured on Jan. 2, during a round of testing for the first humanoid robot in space. Ground teams put Robonaut through its paces as they remotely commanded it to operate valves on a task board.

Robonaut is a testbed for exploring new robotic capabilities in space, and its form and dexterity allow it to use the same tools and control panels as its human counterparts do aboard the station.

Photo Credit: NASA

THE MARTIAN BULGE

FROM: NASA

Thermal Tides at Mars

This diagram illustrates Mars' "thermal tides," a weather phenomenon responsible for large, daily variations in pressure at the Martian surface. Sunlight heats the surface and atmosphere on the day side of the planet, causing air to expand upwards. At higher levels in the atmosphere, this bulge of air then expands outward, to the sides, in order to equalize the pressure around it, as shown by the red arrows. Air flows out of the bulge, lowering the pressure of air felt at the surface below the bulge. The result is a deeper atmosphere, but one that is less dense and has a lower pressure at the surface, than that on the night side of the planet. As Mars rotates beneath the sun, this bulge moves across the planet each day, from east to west. A fixed observer, such as NASA's Curiosity rover, measures a decrease in pressure during the day, followed by an increase in pressure at night. The precise timing of the increase and decrease are affected by the time it takes the atmosphere to respond to the sunlight, as well as a number of other factors including the shape of the planet's surface and the amount of dust in the atmosphere.

Image credit: NASA/JPL-Caltech/Ashima Research/SWRI

ESA / ESOC Jahresplanung 2013

ESA / ESOC Jahresplanung 2013

TITAN'S LAKE DISTRICT AND CHANGES IN LAKE LEVELS

FROM: NASA
Titan's Lake District, One Season Later

These images obtained by NASA's Cassini spacecraft show Titan's stable northern lake district. Cassini's radar instrument obtained the recent images on May 22, 2012. It observed some previously unseen regions but also some regions containing lakes that were last observed about six years-nearly one Titan season--ago. This marks the longest time interval between lake observations in the northern hemisphere.

The top image here shows part of the radar swath from May 22, 2012, centered near 79 degrees north latitude, 58 degrees west longitude, and about 220 by 47 miles (350 by 75 kilometers) in dimension. At the bottom, parts of this image are compared with those obtained in 2006. (The images appear slightly different from previous releases because they use a new filtering technique). In 2006, it was winter in the northern hemisphere and the lakes were in the dark. Although Titan spring began in 2009 and the sun has now risen over the lakes, there is no apparent change in lake levels since the 2006 flybys, consistent with climate models that predict stability of liquid lakes over several years. This shows that the northern lakes are not transient weather events, in contrast to the temporary darkening of parts of the equator after a rainstorm in 2010 (PIA 12819).

Changes in lake levels may still be detected later in the mission as Cassini continues to observe these high northern latitudes into the beginning of summer in 2017. At that point, the sun may cause evaporation. However, the lack of significant change over six years sets important constraints for climate models and the stability of liquids on Titan. Illumination is coming from the bottom.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, DC. The Cassini orbiter was designed, developed and assembled at JPL. The radar instrument was built by JPL and the Italian Space Agency, working with team members from the United States and several European countries. Image Credit: NASA/JPL-Caltech/ASI

Game on - Europese codes bereiken het International Space Station

Game on - Europese codes bereiken het International Space Station

NEW ADDITION TO SPACE STATION TO BE DISCUSSED

FROM: NASA

NASA, BIGELOW OFFICIALS TO DISCUSS SPACE STATION EXPANDABLE MODULE WASHINGTON


-- NASA has awarded a $17.8 million contract to Bigelow Aerospace to provide a new addition to the International Space Station. The Bigelow Expandable Activity Module will demonstrate the benefits of this space habitat technology for future exploration and commercial space endeavors. "The International Space Station is a unique laboratory that enables important discoveries that benefit humanity and vastly increase understanding of how humans can live and work in space for long periods," NASA Deputy Administrator Lori Garver said. "This partnership agreement for the use of expandable habitats represents a step forward in cutting-edge technology that can allow humans to thrive in space safely and affordably, and heralds important progress in U.S. commercial space innovation." Garver and Bigelow Aerospace Founder and President Robert Bigelow will discuss the Bigelow Expandable Activity Module program at a media availability at 1:30 p.m. EST (10:30 a.m. PST) Wednesday, Jan. 16, at Bigelow Aerospace facilities located at 1899 W. Brooks Ave. in North Las Vegas.

Cloud-free view of Ireland, UK and France

Cloud-free view of Ireland, UK and France

NASA Rules Out Earth Impact in 2036 for Asteroid Apophis - NASA Jet Propulsion Laboratory

NASA Rules Out Earth Impact in 2036 for Asteroid Apophis - NASA Jet Propulsion Laboratory

PHOTOS FROM MARS

FROM: NASA

Opportunity at 'Copper Cliff,' Sol 3153, Stereo View

This 180-degree, stereo mosaic of images from the navigation camera on the NASA Mars Exploration Rover Opportunity shows terrain near the rover during the 3,153rd Martian day, or sol, of the rover's work on Mars (Dec. 6, 2012). West is at the center, south at the left edge, north at the right edge. The view appears in three dimensions when viewed through red-blue glasses with the red lens on the left.

Opportunity had driven about 7 feet (2.2 meters) westward earlier on Sol 3153 to get close to the outcrop called "Copper Cliff," which is in the center of this scene. The location is on the east-central portion of "Matijevic Hill" on the "Cape York" segment of the western rim of Endeavour Crater.

The view is presented as a cylindrical-perspective projection.
Credit-NASA-JPL-Caltech

Panoramic View From Near 'Point Lake' in Gale Crater, Sol 106

This panorama is a mosaic of images taken by the Mast Camera (Mastcam) on the NASA Mars rover Curiosity during the 106th Martian day, or sol, of the mission (Nov. 22, 2012). The rover was near a location called "Point Lake" for an overlook of a shallow depression called "Yellowknife Bay" which is in the left third of this scene, in the middle distance.

The image spans 360 degrees, with south at the center. It has been white-balanced to show what the rocks and soils in it would look like if they were on Earth.

Image Credit-NASA-JPL-Caltech-Malin Space Science Systems

U.S. Department of Defense Armed with Science Update: Communications and Sensing 2.0

U.S. Department of Defense Armed with Science Update

THE IION THRUSTER

FROM: U.S. DEPARTMENT OF DEFENSE

by jtozer

Saturday Space Sight: Ion Thruster Sets World Record

While the Dawn spacecraftis visiting the asteroids Vesta and Ceres, NASA Glenn has been developing the next generation of ion thrusters for future missions. NASA's Evolutionar Xeon Thruster (NEXT) Project has developed a 7-kilowatt ion thruster that can provide the capabilities needed in the future.

An ion thruster produces small levels of thrust relative to chemical thrusters, but does so at higher specific impulse (or higher exhaust velocities), which means that an ion thruster has a fuel efficiency of 10-12 times greater than a chemical thruster.

The higher the rocket’s specific impulse (fuel efficiency), the farther the spacecraft can go with a given amount of fuel.

Given that an ion thruster produces small levels of thrust relative to chemical thrusters, it needs to operate in excess of 10,000 hours to slowly accelerate the spacecraft to speeds necessary to reach the asteroid belt or beyond.

The NEXT ion thruster has been operated for over 43,000 hours, which for rocket scientists means that the thruster has processed over 770 kilograms of xenon propellant and can provide 30 million-newton-seconds of total impulse to the spacecraft. This demonstrated performance permits future science spacecraft to travel to varied destinations, such as extended tours of multi-asteroids, comets, and outer planets and their moons.

Photo Credit:  NASA

ISS WEEKLY RECAP FOR JANUARY 11, 2013

FROM: NASA

THE MARTIAN MOUNTAIN WINDS

FROM: NASA

Mountain Winds at Gale Crater
This graphic shows the pattern of winds predicted to be swirling around and inside Gale Crater, which is where NASA's Curiosity rover landed on Mars. Modeling the winds gives scientists a context for the data from Curiosity's Rover Environmental Monitoring Station (REMS).

Curiosity's current location is marked with an "X." The rover's setting within a broad depression between the mountain dubbed "Mount Sharp" to the southeast and the rim of Gale Crater to the northwest strongly affects wind measurements collected by REMS.

This snapshot shows midday conditions. In the daytime, winds rise out of the crater, shown by the red arrows, and up the mountain, shown by the yellow arrows. Blue arrows indicate winds that flow along the depression and seem, to Curiosity, to be coming up out of the depression since Curiosity is near the bottom. At its current location, Curiosity may be seeing a mixture of these winds, making it challenging to understand its weather readings.

The patterns reverse in the evening and overnight, when winds flow in the downhill direction.

The background image is an oblique view of Gale Crater, looking toward the southeast. It is an artist's impression using two-fold vertical exaggeration to emphasize the area's topography. The crater's diameter is 96 miles (154 kilometers).

The image combines elevation data from the High Resolution Stereo Camera on the European Space Agency's Mars Express orbiter, image data from the Context Camera on NASA's Mars Reconnaissance Orbiter, and color information from Viking Orbiter imagery.

Image credit: NASA/JPL-Caltech/ESA/DLR/FU Berlin/MSSS

Το Herschel συνέλαβε τον αστεροειδή Apophis

Το Herschel συνέλαβε τον αστεροειδή Apophis

Zero Robotics - Scholieren besturen minisatellieten ín het ISS

Zero Robotics - Scholieren besturen minisatellieten ín het ISS

Una cuna de estrellas

Una cuna de estrellas

ROVER SELF-PORTRAIT

 

FROM:  NASA
Curiosity Self-Portrait, Wide View
On the 84th and 85th Martian days of the NASA Mars rover Curiosity's mission on Mars (Oct. 31 and Nov. 1, 2012), NASA's Curiosity rover used the Mars Hand Lens Imager (MAHLI) to capture dozens of high-resolution images to be combined into self-portrait images of the rover.

The mosaic shows the rover at "Rocknest," the spot in Gale Crater where the mission's first scoop sampling took place. Four scoop scars can be seen in the regolith in front of the rover. A fifth scoop was collected later.

Self-portraits like this one document the state of the rover and allow mission engineers to track changes over time, such as dust accumulation and wheel wear. Due to its location on the end of the robotic arm, only MAHLI (among the rover's 17 cameras) is able to image some parts of the craft, including the port-side wheels.

Image Credit: NASA/JPL-Caltech/MSSS

THE DIRT ON MARS

FROM: NASA

A Sampling of Martian Soils
This collage shows the variety of soils found at landing sites on Mars. The elemental composition of the typical, reddish soils were investigated by NASA's Viking, Pathfinder and Mars Exploration Rover missions, and now with the Curiosity rover, using X-ray spectroscopy. The investigations found similar soil at all landing sites. In addition, the soil was usually unchanged over the traverse across the Martian terrain made by both Mars Exploration Rovers.

The Mars Exploration Rover Spirit's landing region in Gusev Crater is seen in both pictures at top; Viking's landing site is shown at lower left; and a close-up of Curiosity's Gale Crater soil target called "Portage" is at lower right.

In Gusev Crater, several white subsurface deposits were excavated with Spirit’s wheels and found to be either silica-rich or hydrated ferric sulfates.

Image credit-NASA-JPL-Caltech

NASA - Researchers Identify Water Rich Meteorite Linked to Mars Crust

NASA - Researchers Identify Water Rich Meteorite Linked to Mars Crust

NASA Green Aviation Project to Move Into Next Phase of Research

NASA Green Aviation Project to Move Into Next Phase of Research