A nebula that extends its hand into space
The Gum Nebula is an emission nebula almost 1400 light-years away. It's home to an object known as "God's Hand" among the faithful. The rest of us call it CG 4.
The Gum Nebula is an emission nebula almost 1400 light-years away. It's home to an object known as "God's Hand" among the faithful. The rest of us call it CG 4.
Astronomy
May 8, 2024
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The construction of wind turbines as a cornerstone for the production of climate-friendly electricity is rapidly increasing all over the world—and everywhere this results in major challenges for bats, which die directly ...
Ecology
Apr 10, 2024
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A new study led by Jarmo Kikstra, a research scholar in the IIASA Energy, Climate, and Environment Program, explores whether reducing production and consumption growth could make a significant contribution to resolving the ...
Environment
Apr 8, 2024
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The global energy transition could happen sooner than anticipated if sensitive intervention points are used to deliver China's carbon neutrality policy at the city-level, researchers from the University of Oxford and The ...
Environment
Apr 5, 2024
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18
Think of onshore oil fields and images of oil derricks and "nodding donkeys" may spring to mind, perhaps in Texas or the Middle East. So it might come as a surprise to learn that the UK has its own onshore oil fields, mostly ...
Environment
Mar 19, 2024
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Another of the instruments planned for flight aboard NASA's Interstellar Mapping and Acceleration Probe (IMAP) is ready for installation on the spacecraft.
Space Exploration
Mar 19, 2024
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Germany's greenhouse gas emissions dropped by one-tenth last year as renewable energy grew in importance, the use of coal and gas diminished and economic pressures weighed on businesses and consumers, official data showed ...
Environment
Mar 15, 2024
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The Great Southern Australian Coastal Upwelling System is an upward current of water over vast distances along Australia's southern coast. It brings nutrients from deeper waters to the surface. This nutrient-rich water supports ...
Earth Sciences
Mar 8, 2024
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1
Energy-related carbon dioxide emissions rose to a record level in 2023, but the growth slowed from previous years thanks to continued expansion of clean technologies, the International Energy Agency said Friday.
Environment
Mar 1, 2024
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17
Using XMM-Newton, Chandra and NuSTAR space telescopes, an international team of astronomers has explored the nature of a recently-detected very-high-energy source designated 2FHL J1745.1–3035. Results of the study, published ...
Wind power is the conversion of wind energy into a useful form, such as electricity, using wind turbines. At the end of 2008, worldwide nameplate capacity of wind-powered generators was 121.2 gigawatts (GW). Wind power produces about 1.5% of worldwide electricity use, and is growing rapidly, having doubled in the three years between 2005 and 2008. Several countries have achieved relatively high levels of wind power penetration, such as 19% of stationary electricity production in Denmark, 11% in Spain and Portugal, and 7% in Germany and the Republic of Ireland in 2008. As of May 2009, eighty countries around the world are using wind power on a commercial basis.
Large-scale wind farms are connected to the electric power transmission network. Smaller turbines are used to provide electricity to isolated locations. Utility companies increasingly buy back surplus electricity produced by small domestic turbines. Wind energy as a power source is attractive as an alternative to fossil fuels, because it is plentiful, renewable, widely distributed, clean, and produces no greenhouse gas emissions; however, the construction of wind farms (as with other forms of power generation) is not universally welcomed due to their visual impact and other effects on the environment.
Wind power is non-dispatchable, meaning that for economic operation all of the available output must be taken when it is available, and other resources, such as hydropower, and standard load management techniques must be used to match supply with demand. The intermittency of wind seldom creates problems when using wind power to supply a low proportion of total demand. Where wind is to be used for a moderate fraction of demand, additional costs for compensation of intermittency are considered to be modest.
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