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It was formed approximately 4.5 billion years ago, is a terrestrial planet and is the second smallest of the Solar System 's planets with a diameter of 6,779 km (4,212 mi). A Martian solar day ( sol) is 24.5 hours and a Martian solar year is 1.88 Earth years (687 Earth days). Mars has two small and irregular natural satellites: Phobos and Deimos.
An individual retirement account [1] ( IRA) in the United States is a form of pension [2] provided by many financial institutions that provides tax advantages for retirement savings. It is a trust that holds investment assets purchased with a taxpayer's earned income for the taxpayer's eventual benefit in old age.
Barnes–Hut simulation. A 100-body simulation with the Barnes–Hut tree visually as blue boxes. The Barnes–Hut simulation (named after Josh Barnes and Piet Hut) is an approximation algorithm for performing an n -body simulation. It is notable for having order O ( n log n) compared to a direct-sum algorithm which would be O ( n2 ).
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English Wikipedia (marked blue in the graph) is the most-read version of Wikipedia, accounting for 48% of the website's global traffic as of 2021. The English Wikipedia is the most edited Wikipedia's language version of all time. The English Wikipedia reached 4,000,000 registered user accounts on 1 April 2007, [23] over a year since the ...
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The Los Angeles County Employees Retirement Association ( LACERA) is an independent Los Angeles County agency that administers and manages the retirement fund for the County and outside Districts (Little Lake Cemetery District, Local Agency Formation Commission for the County of Los Angeles, Los Angeles County Office of Education, and South ...
McGiffert Log Loader in East Texas, US, c.1907. Lumber under snow in Montgomery, Colorado, 1880s. Logging is the process of cutting, processing, and moving trees to a location for transport. It may include skidding, on-site processing, and loading of trees or logs onto trucks [1] or skeleton cars.