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Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars . Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation.
[nb 1] Earth's orbital speed averages 29.78 km/s (19 mi/s; 107,208 km/h; 66,616 mph), which is fast enough to cover the planet's diameter in 7 minutes and the distance to the Moon in 4 hours. [3] The point towards which the Earth in its solar orbit is directed at any given instant is known as the "apex of the Earth's way".
The stars viewed from Earth are seen to proceed from east to west daily (at about 15 degrees per hour), due to the Earth's diurnal motion, and yearly (at about 1 degree per day), due to the Earth's revolution around the Sun. At the same time the stars can be observed to anticipate slightly such motion, at the rate of approximately 50 arc ...
23 days 15 hours 21 minutes and 3 seconds 1928 1928 [15] Hugo Eckener: 21 days, 5 hours and 31 minutes 8 August 1929 29 August 1929 First circumnavigation in an airship, aboard LZ 127 Graf Zeppelin from Lakehurst, New Jersey [16] [17] Pilot Wiley Post and navigator Harold Gatty: 8 days, 15 hours and 51 minutes 23 June 1931 1 July 1931
On the planet Earth specifically, since a gravity train's movement is the projection of a very-low-orbit satellite's movement onto a line, it has the following parameters: The travel time equals 2530.30 seconds (nearly 42.2 minutes, half the period of a low Earth orbit satellite), assuming Earth were a perfect sphere of uniform density.
Earth's circumference is the distance around Earth. Measured around the equator, it is 40,075.017 km (24,901.461 mi). Measured passing through the poles, the circumference is 40,007.863 km (24,859.734 mi). [1] Treating the Earth as a sphere, its circumference would be its single most important measurement. [2]
Franck Cammas and a crew of 10; 2010; French trimaran Groupama 3; set the fastest maritime circumnavigation at the time, in a time of 48 days, 7 hours 44 minutes and 52 seconds. [8] Dilip Donde (Indian Navy); 2009–2010; first Indian to carry out a solo circumnavigation; stopped in four ports – Fremantle, Lyttelton, Port Stanley and Cape ...
The spacecraft flight plan was to lift off from SpaceX's Starbase facility along the south Texas coast, then conduct a powered flight until reaching the desired transatmospheric Earth orbit, estimated to be around 250 × 50 km (155 × 31 mi), which would have caused Starship to re-enter the atmosphere after roughly 1 hour, 17 minutes of flight ...