News tagged with air
Low speed wind tunnel gets new motor
A new motor has been installed in the Oran W. Nicks Low Speed Wind Tunnel, replacing a 900RPM, 1,000-horsepower synchronous motor from Allis-Chalmers that was surplused by the U.S. Navy back in World War II.
14 hours ago |
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Beetle-infested pine trees contribute more to air pollution and haze in forests
The hordes of bark beetles that have bored their way through more than 6 billion trees in the western U.S. and British Columbia since the 1990s do more than damage and kill stately pine, spruce and other trees. ...
May 23, 2012 |
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Key facts about SpaceX
Space Exploration Technologies is the first private company to attempt to send its own cargo capsule to the International Space Station and back.
Space & Earth / Space Exploration
May 22, 2012 |
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Europe's largest solar telescope opens in Canary Islands
A powerful solar telescope billed as the largest in Europe opened Monday on Spain's Canary Islands which scientists say will allow them to study the sun in unprecedented detail.
Space & Earth / Space Exploration
May 21, 2012 |
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SpaceX readies ambitious ISS launch
California-based company SpaceX was poised to launch its Dragon capsule to the International Space Station Saturday in what may be a historic mission for private spaceflight.
Space & Earth / Space Exploration
May 18, 2012 |
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SpaceX poised for high-stakes space station launch
SpaceX on Saturday aims to become the first private company to send its own cargo ship to the International Space Station, a feat that only a handful of world governments have pulled off.
Space & Earth / Space Exploration
May 17, 2012 |
5 / 5 (5) |
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US launches air pollution data in Shanghai
The United States consulate in Shanghai has begun issuing its own pollution statistics, giving a much more pessimistic assessment of the city's air quality than official Chinese data.
May 15, 2012 |
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Amadeus posts jump in net profit as global travel rises
Spain's Amadeus, the world's biggest processor of travel bookings, posted Wednesday a double-digit jump in its first quarter net profit on the back of a rise in global travel.
May 09, 2012 |
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Image: Boeing tests parachute system for CST-100 spacecraft
The main parachutes deploy for Boeing's crew capsule during a parachute drop test on May 2, 2012. This is the second successful parachute drop test for its Crew Space Transportation (CST) spacecraft, part of Boe ...
Space & Earth / Space Exploration
May 09, 2012 |
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Fringe trees are finding new homes in urban landscapes
It's a little tree with big personality - fringe tree, or Chionanthus virginicus.
May 04, 2012 |
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Company offers first independently controlled auto A/C system
(Phys.org) -- Automobile air conditioner maker Denso Corporation has announced a first for cars, an air conditioning system that allows for true independent heating and cooling of driver, passenger and back seat areas, resulting ...
May 04, 2012 |
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NASA's commercial crew partner Boeing completes parachute test
The Boeing Company successfully completed the second parachute drop test for its Crew Space Transportation (CST) spacecraft Wednesday, part of its effort to develop commercial crew transportation capabilities that could ferry ...
Space & Earth / Space Exploration
May 04, 2012 |
5 / 5 (1) |
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Long-term monitoring shows 60 percent reduction in acidity of Delaware rain
Several decades ago, precipitation in Delaware was among the most acidic in the country. Pollutants in the air reacted with rainwater to sprinkle sulfuric, nitric and carbonic acids onto the ground below, ...
May 03, 2012 |
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Stream temperatures don't parallel warming climate trend
A new analysis of streams in the western United States with long-term monitoring programs has found that despite a general increase in air temperatures over the past several decades, streams are not necessarily warming at ...
May 02, 2012 |
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Portable gas sensors improve atmospheric pollution measurements
Different types of compact, low-power portable sensors under development by three independent research groups may soon yield unprecedented capabilities to monitor ozone, greenhouse gases, and air pollutants. ...
Apr 30, 2012 |
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Earth's atmosphere
The Earth's atmosphere is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. It has a mass of about five quadrillion metric tons. Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.
There is no definite boundary between the atmosphere and outer space. It slowly becomes thinner and fades into space. An altitude of 120 km (75 mi) marks the boundary where atmospheric effects become noticeable during atmospheric reentry. The Kármán line, at 100 km (62 mi), is also frequently regarded as the boundary between atmosphere and outer space. Three quarters of the atmosphere's mass is within 11 km (6.8 mi; 36,000 ft) of the surface.
For more information about Earth's atmosphere, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
