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Stellar brightness is based on the apparent visual magnitude as perceived by the human eye, from the brightest stars of 1st magnitude to the faintest at 6th magnitude. Since the invention of the optical telescope and the documenting of binary stars and multiple star systems, stellar brightness could be expressed as either individual (separate ...
Normal maximum brightness is 2.29; magnitude 0.7 once observed 2.39 Epsilon Boötis: Binary star system 2.41 2.14 Mintaka: Triple star system 2.41 Kappa Scorpii: Binary star system Maximum brightness 2.42 2.31 Beta Pegasi: Star 2.42 Eta Ophiuchi: Binary star system 2.440 Phecda: Binary star system 2.45 2.38 Eta Canis Majoris: Star 2.46 Alpha ...
Voice command "Keep Tesla Safe" or "Keep Summer Safe" were discovered to activate sentry mode. [13] Sentry mode, which was originally depicted on the in-vehicle display as HAL 9000 from 2001: A Space Odyssey, but replaced by what appears to be the eye of a sentient sentry turret from the Valve video game Portal, [14] is a Tesla security feature that can be toggled on or off using voice ...
The excellent keyboard shows up other ultrabooks, and the rugged build quality is reassuring. With a slightly boosted battery and maybe a lower starting price, this could be a serious contender for my all-around favorite thin laptop." [68] Peter Bright wrote a disparaging review for Ars Technica. He found the new X1 Carbon with the "Adaptive ...
The version history of the Android mobile operating system began with the public release of its first beta on November 5, 2007. The first commercial version, Android 1.0, was released on September 23, 2008.
Although predicting the brightness of comets with any degree of accuracy is very difficult, Hale-Bopp met or exceeded most predictions when it passed perihelion on April 1, 1997. [138] 1998 USS Yorktown (CV-5) wreckage
HP EliteBook is a line of business-oriented laptop computers made by Hewlett-Packard (), [1] marketed as a high-end line positioned above the ProBook series. [2] The line was introduced in August 2008 [3] [4] as a replacement of the HP Compaq line of business laptops, and initially included mobile workstations until September 2013, when they were rebranded as HP ZBook.
Leonardo wrote aerodynamic studies in a notebook eventually titled ''Codex on the Flight of Birds''. [1] The Barsanti-Matteucci engine, the first proper internal combustion engine The voltaic pile presented by Alessandro Volta to Napoleone Bonaparte Alessandro Cruto, creator of the first practical long-lasting incandescent light bulb [2]