Urban areas are currently responsible for ~70% of the global energy-related carbon dioxide (CO2) emissions, and rapid ongoing global urbanization is increasing the number and size of cities. Thus, understanding city-scale CO2 emissions and how they vary between cities with different urban densities is a critical task. While the relationship …
Saturn is the second largest planet in our solar system. With a colourful ring system surrounding the planet, it is highly attractive. Only brief observations, using telescopes, Pioneer-11, Voyager-1 and Voyager-2 in situ recorders have been made. Comparatively impressive details of Saturn have already been obtained. A space mission named …
The European Space Agency (esa) claims that its Mars orbiter has detected direct evidence of water in the form of ice on the planet's surface. According to esa scientists, the discovery is based on water vapour molecules' analysis by an infrared camera aboard the Mars Express spacecraft that is circling …
function mars() { var popurl="html/20040131_mars.htm" winpops=window.open(popurl,"","width=550,height=500,scrollbars=yes") } The world's powers celebrated Christmas 2003 in style: they sent robotic geologists to the red planet Mars, Earth's uninviting and hostile neighbour. Two major space-faring powers, the European Union (eu) and the us, extended their race for space supremacy to Mars with their …
to date, carbon dioxide has been mainly blamed for global warming. But black carbon particles (commonly known as soot) have also done a fair amount of damage, a recent study indicates. As per its findings, black soot, the dusty by-product of the incomplete combustion of fossil fuels, is responsible for …
thirty years after they were abandoned for good, nuclear reactors are making a fatal comeback in the us spacecrafts. In 2003, the us National Aeronautics and Space Administration (nasa) was notified about a federal commitment of us $3 billion to develop nuclear-fuelled engines in the next five years. The sum …
The investigation into the Columbia shuttle disaster in February has thrown up a startling detail. Inaccurate computer data misled flight engineers into thinking that the shuttle could return safely to Earth, reveals the probe team. Scientists had concluded during the flight that a minor incident during lift-off
http://www.science.nasa.gov This National Aeronautics and Space Administration (NASA)-maintained website should be of immense interest to space-watchers. Its purpose is to update the public on exciting developments in NASA research and help the organisation's "scientists fulfil their outreach responsibilities'. On-site scientific content is segregated to suit "kids, teachers and adults'. The …
function openpopimg(){ var popurl1="http://www.downtoearth.org.in/html/20021130_p48.htm" winpops=window.open(popurl1,"",'height=500,width=500,top=20,left=150,scrollbars=yes') } Who is the artist? Recently, an uninhabited aerial vehicle (uav) hovered over a coffee plantation in Hawaii. Its digital imaging systems clicked over 300 photographs, all of them high-resolution. The uav's controllers, nasa (National Aeronautics and Space Administration, usa) scientists and researchers, were able …
The world's first solar-powered aircraft, Helios, has made a world altitude record. It reached 24.7 km, five hours and 16 minutes after its launch from the us navy's Pacific Missile Range Facility at Barking Sands, Kauai. Helios, the aircraft of the National Aeronautics and Space Administration (nasa), surpassed the all-time …
we may not be the only ones. With the discovery of a new planet, a team of astronomers has come a step closer to finding solar systems that might have characteristics similar to our own. The team recently found a Jupiter-sized planet in a circular orbit around a faint star …
titan, Saturn's largest moon, has conditions that resemble those that prevailed on the Earth before the advent of life. Now scientists have discovered that the moon has high velocity winds which blow from west to east. This new information will prove invaluable for space scientists who are planning to land …
the world's first solar-powered aircraft, Helios, successfully completed its 18-hour test flight over the Pacific Ocean on July 15, 2001. Helios, the unmanned aircraft of National Aeronautics and Space Administration ( nasa ) powered by 62,000 solar cells, reached an altitude of almost 22 kilometres (km) before descending. The craft …
The Thai government will use the satellites of the National Aeronautical Space Administration ( nasa ) to assess the spread of the country's worst outbreak of malaria in five years. The satellites will be used for surveying malaria-affected regions. The number of patients affected by the disease has increased tenfold …
Latest NASA (National Aeronautics and Space Administration) satellite maps reveal that most of the world's glaciers are shrinking. Rick Wessels of the US Geographical Survey, based in Arizona, compared thousands of satellite images to aerial photographs dating back 20 years and found almost every mountain glacier in Patagonia, the Himalayas, …
a nearly complete view of the world's air pollution has been recently assembled by the National Aeronautical Space Administration ( nasa ). The images reveal expansive clouds of carbon monoxide and other air pollutants over continents and oceans worldwide. The major sources of these pollutants include air pollution from forest …
A cloud of dust up to 2,000 km long was tracked by scientists at the US National Aeronautical Space Administration (NASA) as it left Asia, drifted across the Pacific Ocean, and traversed North America from Alaska to Florida, raining dust and possibly pollutants over the continent. Dust clouds blowing east …
Argentina's diverse ecology is being used to test the ability of a satellite of the National Aeronautical and Space Administration (nasa), EO1. Argentina was chosen for the testing because of its enormous biodiversity. "It has ecosystems that are equivalent to going to Hudson Bay in Canada and all the way …
Air pollution causes a decrease in tropical rainfall. The US National Aeronautical and Space Administration (nasa) has discovered an important link between air pollution and rainfall, reports the United Press International. "The concentration of pollution particles redistribute the water inside the clouds into numerous small droplets that are too small …
Minute traces of specially designed greenhouse gases can be used to heat up Mars and make the planet habitable much faster than anyone thought possible. "On the Earth these gases may be pollution, but on Mars they are medicine,' says Chris McKay, who organised a meeting at the National Aeronautics …
The US National Aeronautics and Space Administration (NASA) has announced a new programme of Mars exploration that aims to proceed at a "more methodical and leisurely pace'. Till now two missions have failed. Going by the new schedule, researchers will have to wait for at least a dozen years before …
