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Earth radius (denoted as R 🜨 or R E) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid (an oblate ellipsoid), the radius ranges from a maximum (equatorial radius, denoted a) of nearly 6,378 km (3,963 mi) to a minimum (polar radius, denoted b) of nearly 6,357 km (3,950 mi).
The astronomical unit (symbol: au [1] [2] [3] [4] or AU) is a unit of length defined to be exactly equal to 149 597 870 700 m. [5] Historically, the astronomical unit ...
Knowledge of the location of Earth has been shaped by 400 years of telescopic observations, and has expanded radically since the start of the 20th century. Initially, Earth was believed to be the center of the Universe, which consisted only of those planets visible with the naked eye and an outlying sphere of fixed stars. [1]
When her husband, George W. Bush, was sworn in as president for the second time, the former first lady decided to wear a dazzlingly white cashmere coatdress from Oscar de la Renta, which she ...
Yields: 4-6 servings. Prep Time: 10 mins. Total Time: 4 hours 30 mins. Ingredients. 1 1/2 lb. sirloin steak, thinly sliced. 1 c. low-sodium beef broth. 1/2 c.
President-elect Trump fired off a Saturday post on Truth Social accusing Democrats of paying celebrities to publicly endorse Vice President Harris, including MSNBC host Al Sharpton. “Are the ...
Posidonius calculated the Earth's circumference by reference to the position of the star Canopus.As explained by Cleomedes, Posidonius observed Canopus on but never above the horizon at Rhodes, while at Alexandria he saw it ascend as far as 7 + 1 ⁄ 2 degrees above the horizon (the meridian arc between the latitude of the two locales is actually 5 degrees 14 minutes).
Shifts in the oceanic temperature distribution can cause significant weather shifts, such as the El Niño–Southern Oscillation. [ 208 ] The abundance of water, particularly liquid water, on Earth's surface is a unique feature that distinguishes it from other planets in the Solar System .