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Where are we in space and time? (This turns out to be a relatively complicated question!)
distance from the earth to the edge of the visible universe:  approximately 46.5 billion light years in any direction number of galaxies in the visible universe:    approximately 350 billion large galaxies and 7 trillion dwarf galaxies virgo supercluster -diameter: 110 million light years -pop: approx 100 galaxy groups & clusters (incl local group) local group  -diameter:10 million light years -population:30+ galaxies including the milky way and dwarf galaxies milky way is moving away from other galaxies as the universe expands at approx. 50 miles/second/megaparsec milky way galaxy   - radius: 50,000 light years   - thickness: 1000 light years   - population: 200-400 billion stars distance from center of our solar system (sun) to the center of the milky way galaxy:  approx. 25,000 light years orbital speed of our solar system about the center of the milky way galaxy:      approximately 137 miles/second earth's orbital speed: 67,062 mph.....earth's rotational speed: 1038mph(equator)...861mph(Powder Springs, GA) perihelion 01-02-24 (closest to sun: 91,403,034 miles) ...aphelion 07-05-24 (farthest from sun: 94,506,364 miles) earth's current tilt:  23.440 degrees - slowly decreasing through a 41,000 year cycle - from 24.5 to 22.1 degrees. earth's average diameter: equatorial is 7926 miles, polar is 7900 miles... moon's average diameter is 2159 miles moon's average orbital speed: 2287mph...... perigee (closest) 229,798 miles......apogee (farthest) 252,671 miles vernal equinox 03-19-24 .....summer solstice 06-20-24.....autumnal equinox 09-22-24.....winter solstice 12-21-24 daylight savings.... begins on Sunday, March 10, 2024 (2:00am)... ends on Sunday, November 3, 2024 (2:00am)
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