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Animation (not to scale) showing geosynchronous satellite orbiting the Earth. A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds (one sidereal day). The synchronization of rotation and orbital period means that, for ...
kilometres per hour: 1 080 000 000: miles per second: 186 000: miles per hour [1] 671 000 000: astronomical units per day: 173 [Note 1] parsecs per year: 0.307 [Note 2] Approximate light signal travel times; Distance: Time: one foot: 1.0 ns: one metre: 3.3 ns: from geostationary orbit to Earth: 119 ms: the length of Earth's equator: 134 ms ...
In Time's Arrow, Time's Cycle, Gould cited one of the metaphors McPhee used in explaining the concept of deep time: Consider the Earth's history as the old measure of the English yard, the distance from the King's nose to the tip of his outstretched hand. One stroke of a nail file on his middle finger erases human history. [1]
It equals 365.256 363 004 ephemeris days for the J2000.0 epoch. [1] The sidereal year differs from the solar year, "the period of time required for the ecliptic longitude of the Sun to increase 360 degrees", [2] due to the precession of the equinoxes.
A graphical view of the Cosmic Calendar, featuring the months of the year, days of December, the final minute, and the final second. The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its currently understood age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.
Wind speeds on Saturn can reach 1,800 kilometres per hour (1,100 miles per hour). The planet has a bright and extensive system of rings, composed mainly of ice particles, with a smaller amount of rocky debris and dust. At least 146 moons [33] orbit the planet, of which 63 are officially named; these do not include the hundreds of moonlets in ...
Hudson has the form of a 10-kilometre-wide (6-mile) volcanic caldera filled with ice. The volcano has erupted numerous times in the past 2.5 million years forming widespread tephra deposits, and is the most active volcano in the region.
"Planet Earth" is the debut single by the English new wave band Duran Duran, released on 2 February 1981. It was an immediate hit in the band's native UK, reaching number 12 on the UK Singles Chart on 21 February, and did even better in Australia , hitting number 8 to become Duran Duran's first Top 10 hit anywhere in the world.