The Earth moves in three different directions at the same time.
1. It rotates upon its own axis with a speed of about 500 yards per second diminishing from the center towards the Poles.
2. It revolves around the sun with a speed of about 19 miles a second.
3. It participates in the sun's own forward motion in the direction of the fixed star, Vega, in the constellation of Lyra, with a speed of 12 miles per second.
A fourth movement in wich the earth probably participates is that of the sun's own rotation upon its axis wich is accomplished once every 25 days.
A fifth movement - that of the whole stellar system upon its axis - is possible - but doubtful.
Ripley's Believe it or Not!
PS: sobre os movimentos da Terra, veja aqui.
segunda-feira, 28 de janeiro de 2013
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