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 …
AFTER seven years in space, the Hubble space telescope's efficiency is coming down. Radiation has degraded some of the telescope's electronics, while micrometeoroids have occasionally slammed into its mirror, damaging the surface. The craft also suffers from the effects of extreme temperature changes as it passes in and out of …
The National Aeronautics and Space Administration (NASA), US, is planning to improve the EGRET (energetic gamma-ray experiment telescope) -the best high energy gamma-ray instrument installed in the Compton gamma-ray observatory satellite. Observations of gamma-rays in the cosmos provide us with important clues to young pulsars and gamma-ray bursts from different …
unmanned helicopters and farm-harvesters will be the first automated vehicles to roll out from a new research centre in the us, which is trying to sell National Aeronautics and Space Administration's ( nasa ) technology to industries. nasa has given us $2.5 million to Carnegie Mellon University (cmu), Pennsylvania, to …
the first comprehensive global analysis of National Aeronautics and Space Administration's ( nasa 's) 15-year satellite data reveals that increasing amounts of solar ultraviolet ( uv ) radiation have been hitting the earth's surface, with the thinning of the atmospheric ozone shield (see Down To Earth , Vol 5, No …
when Roberta Score, a former staffer of the National Aeronautics and Space Administration (nasa), picked up a little rock one morning in Allan Hills, Antarctica, she knew she was holding something unique in her hands. But it took all of 12 years to realise that she had found what could …
for aerial fire-fighters, exchanging information over vast expanses of flaming wilderness is fraught with high risk and exigency . In an effort to improve the safety and efficiency of aerial fire-fighting, four us-based agencies, the National Aeronautics and Space Administration (nasa), the Bureau of Land Management, the United States Department …
the first global analysis of satellite data by the National Aeronautics and Space Administration ( nasa ) has revealed an interesting finding. Collating 15 years of data, scientists have come to the conclusion that harmful radiation from the sun has been hitting major population centres across the world in increasing …
if you thought that the National Aeronautics and Space Administration ( nasa ) only flew missions to esoteric destinations and designed spacecrafts to endorse the
WITH the new millennium just round the bend, the National Aeronautics and Space Administration (NASA) has dedicated several missions for a planet it did not care for much before - Earth. Dubbed 'The Planet Earth Enterprise', the project seeks to implement NASA's space-age technology for life on earth. An advance, …
THANKS to Steve Casner, a research scientist at the National Aeronautics and Space Administration's (NASA) Ames research centre at Mountain View, California, us, aspiring pilots can now learn to fly advanced commercial aircrafts by using nothing more than a laptop computer. Casner's basic idea was to simulate the programme found …
IT SEEMS to be a jinxed programme for the National Space and Aeronautics Administration (NASA) in the us. While its first effort to deploy a satellite in space as part of the Tethered Satellite System - a joint us-Italian venture - ended unsuccessfully after the tether got jammed, this time, …
IN THE run up to knowing more about outer space and its intricate components, especially the asteroids - rocky leftovers of the birth of the solar system 4.6 billion years ago - the National Aeronautics and Space Administration (NASA) successfully launched the first ever space probe to orbit an asteroid …
The Bubble Space Telescope team at the National Aeronautics and Space Administration (NASA) has recently released the most detailed pictures or optical images of the universe ever seen. The composite picture shows what scientists call the bewildering assortment of at least 1,500 galaxies in a tiny undistinguished patch of the …
THE plucky American spacecraft Galileo, which went into orbit around Jupiter after successfully delivering a 'suicide probe' in December last year, has gradually begun to unveil the mysteries surrounding the planet's atmosphere. , After a reasonably long wait, scientists at the us National Aeronautics and Space Administration (NASA) have now …
CASH-STRAPPED Russians want to make money out of Mir, their station in space. Their proposal to raise funds is to make the National Aeronautics and Space Administration (NASA) officials use Mir, which will outlive its usefulness sometime in the late '90s, for all activities until Alpha, the us space station, …
IT IS being hailed as one of the most ,epochal' moments in the history of unmanned space exploration by the National Aeronautics and Space Administration (NASA), USA: Jupiter, the largest planet in Our solar system, now has an Earthly visitor - Galileo. Defying adverse predictions, Sur mounting all delays, disasters, …
Galileo, en route to Jupiter, flew within 2,400 km of the asteroid Ida to discover a natural satellite, Dactyl. Ida is a member of the Koronis family of asteroids, which are believed to have been created when an enormous body, perhaps 200-300 kin in diameter, was smashed in a collision …
Released by the us National Aeronautics and Space Administration (NASA) on November 2 (see Down To Earth, Vol 4, No 14), these Hubble-captured snapshots hold up to the eye a mind-blowing, spectacular display of cosmic births. Monumental eerie pillars of interstellar hydrogen gas and dust - part of the 7,000 …
AN EXTRA inch or kilogram is proving to be a real bottleneck for those us astronauts wanting to hitch a ride aboard Soyuz, the Russian spacecraft. They are either too short, too tall, too fat or too thin, much to the us-based NASA's (National Aeronautics and Space Administration) discomfort. Three …
