NASA

The Dream Chaser, a reusable space plane currently under development by Sierra Nevada Corporation (SNC), is to undergo high altitude drop tests in 2012 following a 25.6 million US dollar boost from NASA to top-off the 80 million US dollar contract awarded earlier this year. But it won't be chasing just any dream. With the retirement of the Space Shuttle Program this year, the very tangible goal is to deliver a low-cost, safe alternative for transporting astronauts and cargo to the International Space Station and other low Earth orbit destinations. Read More

A recent discovery may add support to the theory that the water on Earth was brought by a rain of comets. Scientists have analyzed the comet Hartley 2, and discovered that ice found on it has the same composition as ocean water. The discovery was made utilizing an orbiting telescope on the Herschel Space Observatory, which can observe organic molecules by reading their far-infrared wavelengths. Read More

Two years ago, aircraft designers were invited to build an electric airplane that could fly at least 200 miles (322 km) in under two hours, using less than one gallon (3.8 liters) of fuel per occupant – or the electrical equivalent. Whichever plane performed best would win its makers a prize of US$1.35 million. That was the idea behind the Green Flight Challenge, a NASA competition that was managed by the Comparative Aircraft Flight Efficiency (CAFE) Foundation, and funded by Google. Well, the challenge wrapped up last week, with the winners being announced this Monday. Pennsylvania’s Pipistrel-USA team took first place, for its Taurus G4. Read More

The Bolshoi cosmological simulation is by far the most ambitious project of its kind. It harnesses the power of supercomputing to bring cosmology into the realm of experimental sciences. Based on observable input data, the Bolshoi simulation allows scientists to see what the higher structure of our universe might have looked like at particular points in time throughout its formation, arming them with tools that should make cracking the mysteries of dark matter, dark energy and galaxy formation much more feasible. Read More

It's a challenging time for the International Space Station (ISS). The single most expensive engineering project in human history and one of the most complex pieces of machinery ever assembled, the future of the ISS remains uncertain after the ending of the Space Shuttle program and the grounding of Russia's Soyuz fleet following an accident last month. While the recently announced resumption of manned Soyuz flights means the danger of the station being evacuated and mothballed has receded ... it hasn’t ended. Read More

NASA's upcoming Technology Demonstration Missions are intended to "transform its space communications, deep space navigation and in-space propulsion capabilities." Three project proposals have been selected for these missions, which should be launching in 2015 and 2016. One of those projects, the Laser Communications Relay Demonstration, we've told you about already. Another, however, will be demonstrating a mission-capable solar sail. While NASA has recently tested a solar sail measuring 100 square feet (9.29 square meters), this one will be the largest ever flown, spanning a whopping 15,543 square feet, or 1,444 square meters. Read More

Since the dawn of the space age, NASA has been relying on radio communications technology to send and receive data to and from spacecraft. Although it has developed higher data-rate radio frequency systems, data-compression, and other techniques to boost the amount of data that its current RF systems can handle, they can't keep pace with the projected data needs of advanced instruments and further human exploration. To break this bottleneck, NASA is turning to optical communications technology that would use lasers to increase data rates over existing systems by anywhere from 10 to 100 times. Read More

If you've been looking to the skies in the hope of catching a glimpse of the doomed UARS satellite before it plummeted to the Earth's surface ... you missed it. NASA is now reporting that the decommissioned satellite fell back to Earth sometime between 11:23 p.m. EDT Friday, Sept. 23 and 1:09 a.m. EDT Sept. 24, making its final dive eastwards over Canada, Africa and finally crashing in the Pacific Ocean. The exact location of the crash has not been officially determined but there are reports that some debris made landfall near Calgary in Canada. NASA says that it is not aware of any reports of injury or property damage. Read More

NASA employees are now holding their breath as the 6.6 ton (6 tonne) out-of-control Upper Atmosphere Research Satellite (UARS) is falling faster than previously expected. Yesterday, NASA announced that the decommissioned satellite is most likely to crash into the earth's surface on Friday 23 September ... give or take a day. Read More