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This user has made thousands of contributions to Wikipedia.


Contributions
Sokolov-Ternov effectHamilton's principal functionHamilton's characteristic functionExperimental observation of Hawking radiationParticle number operator* • Self-organization in biology* • Aleksandr ChudakovAlexey AndreevichA. P. BalachandranIgor TernovMark TroddenStanislav MikheyevAlexei Smirnov* • Shamil AsgarovSeifallah Randjbar-DaemiHabil AliyevAhmad BakikhanovAşık KhanlarSuleyman ValiyevHeino FinkelmannTom LubenskyLubna al-HusseinSheylanli tribeSheylanliBoyatAshaghy AylisAgbashInternational Liquid Crystal SocietyBritish Liquid Crystal SocietyInternational Centre for Theoretical Physics* • ANS Group of CompaniesANS TVANS ChMKhudafarin BridgesAzerbaijan TimeYemen TürküsüJujalarimFöppl–von Kármán equations

* Didn't create but significantly contributed

Picture of the day

The Hitch-Hiker is a 1953 American independent film noir thriller co-written and directed by Ida Lupino and starring Edmond O'Brien, William Talman, and Frank Lovejoy. Based on the 1950 killing spree of Billy Cook, the film follows two friends who are taken hostage by a murderous hitchhiker during an automobile trip to Mexico. The Hitch-Hiker was the first American mainstream film noir directed by a woman, and premiered in Boston on March 20, 1953, to little fanfare. The film was marketed with the tagline: "When was the last time you invited death into your car?" It was selected in 1998 for preservation in the United States National Film Registry as being "culturally, historically or aesthetically significant".

Film credit: Ida Lupino


Today's featured article

The Sun, viewed through a clear solar filter
The Sun, viewed through a clear solar filter

The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating energy from its surface mainly as light and infrared radiation. It is a G-type main-sequence star (G2V), informally called a yellow dwarf, though its light is actually white. It formed about 4.6 billion years ago and is by far the most important source of energy for life on Earth. From Earth the Sun is 1 astronomical unit (1.496×108 km) or about 8 light-minutes away. Its diameter is about 1,391,400 km (864,600 mi), 109 times that of Earth. Its mass is about 330,000 times that of Earth, making up about 99.86% of the total mass of the Solar System. Every second, the Sun fuses about 600 billion kilograms (kg) of hydrogen into helium and converts 4 billion kg of matter into energy. Venerated in many cultures, it is a central subject for astronomical research since antiquity. (This article is part of a featured topic: Solar System.)