![]() ![]() Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.The 'per mega-parsec' forces you to do a summation over vast distances. So, if two side-by-side mega-parsecs expand in one second, the total expansion is 148.6 km. 100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. The mega-parsec unit is required because each mega-parsec of distance is expanding at a rate of 74.3 km/s.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.This is rearranging the above equation and defines the parsec (pc). Given that the tangent of an angle is opposite/adjacent and the opposite side is 1 AU, then the parsec is 1AU/tan(1'). ![]()
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