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It was believed that the cutoff for round objects is somewhere between 100 km and 200 km in radius if they have a large amount of ice in their makeup; [1] however, later studies revealed that icy satellites as large as Iapetus (1,470 kilometers in diameter) are not in hydrostatic equilibrium at this time, [2] and a 2019 assessment suggests that ...
Dirt! The Movie is a 2009 American documentary film directed by filmmakers Gene Rosow and Bill Benenson and narrated by Jamie Lee Curtis. It was inspired by William Bryant Logan's book Dirt: The Ecstatic Skin of the Earth. The documentary starred environmentalists like Wangari Maathai, Vandana Shiva, Gary Vaynerchuk, Paul Stamets, and Bill Logan.
Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221.; The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies.
Size of Saturn compared to Earth and Earth's Moon. Saturn is a gas giant, composed predominantly of hydrogen and helium. It lacks a definite surface, though it is likely to have a solid core. [37] The planet's rotation makes it an oblate spheroid—a ball flattened at the poles and bulging at the equator.
7 μm – diameter of the nucleus of a typical eukaryotic cell [citation needed] about 7 μm – diameter of human red blood cells [88] 3–8 μm – width of strand of spider web silk [89] 5–10 μm – width of a chloroplast [90] 8–11 μm – size of a ground-level fog or mist droplet [91] [note 4] 7–12 μm – the diameter of human ...
Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.
The asteroid and comet belts orbit the Sun from the inner rocky planets into outer parts of the Solar System, interstellar space. [16] [17] [18] An astronomical unit, or AU, is the distance from Earth to the Sun, which is approximately 150 billion meters (93 million miles). [19]
Consequently, the Sun was the fire that one could see through a hole the same size as the Earth on the farthest wheel, and an eclipse corresponded with the occlusion of that hole. The diameter of the solar wheel was twenty-seven times that of the Earth (or twenty-eight, depending on the sources) [ 19 ] and the lunar wheel, whose fire was less ...