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Why is the Sun's corona so much hotter than the Sun's surface? (more unsolved problems in astronomy) The temperature of the photosphere is approximately 6,000 K, whereas the temperature of the corona reaches 1,000,000–2,000,000 K. The high temperature of the corona shows that it is heated by something other than direct heat conduction from the photosphere. It is thought that the energy ...
In 2013, the 175-turbine London Array wind farm, located off the Kent coast, became the largest offshore wind farm in the world; this was surpassed in 2018 by the Walney 3 Extension. In 2013 the Offshore Energy Strategic Environmental Assessment (SEA) was first published and has been updated regularly. It is the guiding document from the UK ...
Outside Europe, a diverse group of 20 or more other countries target renewable energy shares in the 2020–2030 time frame that range from 10% to 50%. [45] Supporters of 100% renewable energy do not consider nuclear power as renewable or sustainable due to perceived risks of disasters and high-level waste management , and consider carbon ...
Google LLC The Google logo used since 2015 Google's headquarters, the Googleplex Formerly Google Inc. (1998–2017) Company type Subsidiary Traded as NASDAQ: GOOGL, GOOG Industry Internet Cloud computing Computer software Computer hardware Artificial intelligence Advertising Founded September 4, 1998 ; 25 years ago (1998-09-04) [a] in Menlo Park, California, United States Founders Larry Page ...
Montreal saw a 20% surge in hotel occupancy for April 7 and April 8. [60] [61] [62] The eclipse caused a drop in solar power generation, with Texas experiencing a decrease from 12,000 MW to just over 3,000 MW at 2 p.m. Wind power generation also decreased by about 50% that day.
Development XV-15 experimental tiltrotor, 1980 Early concept illustrations of V-22 In the late 20th century VTOL aircraft gained popularity, and many prototype designs were developed, but only one entered service; the Harrier fighter/attack jet used a turbo fan engine. A practical tilt-rotor remained more elusive, until finally in the 1980s the United States moved forward with V-22 design ...
ESPN (an abbreviation of its original name, the Entertainment and Sports Programming Network [2]) is an American international basic cable sports channel owned by The Walt Disney Company (80% and operational control) and Hearst Communications (20%) through the joint venture ESPN Inc. The company was founded in 1979 by Bill Rasmussen, Scott ...
The Riverworld is a fictional planet and the setting for a series of five science fiction novels (1971–1983) by American author Philip José Farmer (1918–2009). The Riverworld is an artificial, or heavily terraformed, planet where all humans (and pre-humans) who ever lived throughout history have been restored to life.