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The RQ-3 DarkStar (known as Tier III-or "Tier three minus" during development) is an unmanned aerial vehicle (UAV). Its first flight was on March 29, 1996. The Department of Defense terminated DarkStar in January 1999, after determining the UAV was not aerodynamically stable and was not meeting cost and performance objectives. [1]
However, the dark star is capable of emitting indirect radiation – outward-aimed light and matter can leave the r = 2M surface briefly before being recaptured, and while outside the critical surface, can interact with other matter, or be accelerated free from the star through such interactions. A dark star, therefore, has a rarefied ...
[1] [2] [3] In the unlikely event that dark stars have endured to the modern era, they could be detectable by their emissions of gamma rays , neutrinos , and antimatter and would be associated with clouds of cold molecular hydrogen gas that normally would not harbor such energetic, extreme, and rare particles.
The light seen is approximately the integral of all emission along the line of sight modulated by the optical depth to the viewer (i.e. 1/e times the emission at 1 optical depth, 1/e 2 times the emission at 2 optical depths, etc.). Near the center of the star, optical depth is effectively infinite, causing approximately constant brightness.
In December 2014, NASA awarded Lockheed Martin a contract to study the feasibility of building the SR-72's propulsion system using existing turbine engine technologies, The $892,292 (~$1.13 million in 2023) contract funded a design study to determine the viability of a TBCC propulsion system by combining one of several current turbine engines, with a very low Mach ignition Dual Mode Ramjet (DMRJ).
Once you've made it to a ski resort in Colorado, getting on the mountain is simple.Likely, you'll have one or two options: a ski lift or a six-person gondola up the mountain. In Italy, I saw ...
The Dark Star, a 1917 novel by Robert W. Chambers; Dark Star, a 1929 novel by Lorna Moon; The Dark Star, a 1939 novel by Margaret Mackie Morrison, writing as March Cost; Dark Star, a 1969 novel by Norma K. Hemming, writing as Nerina Hilliard
Disney Sports Snowboarding is a 2003 snowboarding racing video game developed and published by Konami for the Game Boy Advance. The game is part of a series of Disney-licensed sports titles under the Disney Sports brand. Upon release, the game received mixed to average reception, with praise directed towards the game's pre-rendered background ...