Satellite

May 1, 2009 The idea of replacing very expensive space based satellites and Aircraft mounted Airborne Warning And Control Systems (AWACS) with stationary platforms inside Earth's atmosphere has been floated for decades. Despite the fact that lighter-than-air vehicles or airships that could fulfill this role have been flying for over 300 years, the idea is only now getting off the ground. Lockheed Martin has been chosen by the Defense Advanced Research Projects Agency (DARPA) for a US$400 million contract to to design, build, test and fly a 1:3 scale model of an airship surveillance and telecommunications platform called the High Altitude Airship (HAA). The full scale HAA would measure 240 ft long by 70 ft in diameter, run entirely on solar power and be able to stay aloft for up to 10 years. Read More

We’ve recently examined the danger posed to future space missions by the ever increasing collection of space junk orbiting the Earth. Now a plan by a pair of space engineers to use a sail to take out the trash – or rather, bring it back to Earth – may help to stop future space missions adding to the problem of space junk. Read More

In bad news for NASA (and the planet in general), the Orbiting Carbon Observatory (OCO) satellite did not reach orbit as planned yesterday. According to a launch contingency briefing from NASA, the Taurus XL from California's Vandenberg Air Force Base at 4:55 a.m. EST proceeded normally, with only typical "minor issues" reported as the rocket approached lift-off, but preliminary indications are that the fairing on the Taurus XL launch vehicle failed to separate. Read More

When we are born, we soil ourselves and other people clean it up for us. As we mature, we take responsibility for our own excrement. Strangely, as a society, we're not at all good at toilet training ourselves regarding the excrement produced by industry, transport or agriculture. Human beings capacity to eschew short term gain when faced with long term harm is notoriously woeful so it’s not surprising we've done exactly the same thing in space, leaving so much debris that it's now dangerous to be in the orbital band around earth due to the likelihood of being hit by junk traveling at 18,000 mph. The latest evidence: last week saw the first ever accidental collision between two intact spacecraft, a deactivated Russian satellite and an Iridium 33 satellite, which left a fresh cloud of debris 497 miles above the Earth. Read More

NASA’s Orbiting Carbon Observatory spacecraft and its Taurus XL launch vehicle are undergoing preparations for liftoff on February 23. The Orbiting Carbon Observatory’s mission is to collect precise global measurements of carbon dioxide (CO2) in the Earth's atmosphere to improve our understanding of the natural processes and human activities that regulate the abundance and distribution of this important greenhouse gas - important because its the leading human-produced greenhouse gas driving changes in Earth's climate. This improved understanding will enable more reliable forecasts of future changes in the abundance and distribution of CO2 in the atmosphere and the effect that these changes may have on the Earth's climate. Read More

Anyone not familiar with Google’s virtual globe program Google Earth would have to have been living on another planet – maybe Mars. But a new initiative by Google and NASA might pique even Martian interest with the advent of a Mars mode in Google Earth 5. Google Mars 3D brings the red, red hills of home to any Earth bound Martian’s desktop and enables users to fly virtually through enormous canyons and scale huge mountains on Mars, higher than any found on Earth. Read More

NASA's two STEREO spacecraft, launched on October 25, 2006, will align on either side of the sun on February 6, 2011, allowing scientists to view the entire sun simultaneously for the first time in history. The Solar TErrestrial RElations Observatory is currently providing scientists with a view of 75% of the sun. Read More

Until November, Tristan da Cunha was home only to 271 people, a small flightless bird, and a piece of land named Inaccessible Island. Now the world's most remote inhabited archipelago is host to a Danish Observatory designed to help improve our understanding the Earth’s weakening magnetic field and the way this affects satellites. Read More

Dusting off an old renewable energy proposal, president of the National Space Society Ben Bova recently published an article in The Washington Post calling for the next president of the United States to commission a US$1 billion solar power satellite from NASA before the end of their second term. The satellite would harness energy directly from the sun and broadcast it back to a receiver on Earth using microwave frequencies. Read More