Apr 19, 2011

Unequal weights fall with the same speed in a vacuum



"In his 1638 Discorsi Galileo's character Salviati, widely regarded as largely Galileo's spokesman, held that all unequal weights would fall with the same finite speed in a vacuum. (...) Galileo proposed that a falling body would fall with a uniform acceleration, as long as the resistance of the medium through which it was falling remained negligible, or in the limiting case of its falling through a vacuum."

Source: http://en.wikipedia.org/wiki/Galileo_Galilei

Apr 18, 2011

Wonders of the Universe

No APOD de hoje está um vídeo muito interessante que nos leva numa viagem pelos objectos celestes do nosso Cosmos. O vídeo foi criado pela BDH e a música por Timo Baker.
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Today's APOD is not a picture but it is an amazing video which takes us in a journey throughout the Cosmos. The video was produced by  BDH and the music was composed by Timo Baker.
Link to APOD:  http://apod.nasa.gov/apod/ap110418.html


Apr 7, 2011

AAPOD 07/04/11: Biggest Moonrise in almost 20 years



É com agrado que vejo mais uma foto minha como AAPOD!
Link permanente:
http://astronomy.fm/aapod/2011-04-07_Biggest-Moonrise-in-almost-20-years.html
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I am glad that "my Super MoonRise" is today's AAPOD!
Permanet link:
http://astronomy.fm/aapod/2011-04-07_Biggest-Moonrise-in-almost-20-years.html