John Lee Comstock - Phases of Venus, “A System of Natural Philosophy”, 1848.

The Phases of Venus result from the planet’s orbit around the Sun inside the Earth’s orbit giving the telescopic observer a sequence of progressive lighting similar in appearance to the Moon’s phases. It presents a full image when it is on the opposite side of the Sun. It shows a quarter phase when it is at its maximum elongation from the Sun. Venus presents a thin crescent in telescopic views as it comes around to the near side between the Earth and the Sun and presents its new phase when it is between the Earth and the Sun. Since the planet has an atmosphere it can be seen at new in a telescope by the halo of light refracted around the Planet. The full cycle from new to full to new again takes 584 days (the time it takes Venus to overtake the Earth in its orbit). The Planet also changes in apparent size from 9.9 arc seconds at full (superior conjunction) up to a maximum of 68 arc seconds at new (inferior conjunction). Venus reaches its greatest brilliancy (magnitude) -4.5 when it is an intermediate crescent shape at the point in its orbit when it is 68 million kilometers away from the Earth (a combination of its closeness and the fact that it is 28% illuminated).


Chegou o grande dia!!!! Tudo bem que passei do dia, porque disse que seria domingo rs, mas o Youtube nao ajudou muito :/ Saiu o nosso primeiro vídeo, que está explicando a razão pela qual fizemos o Canal. Então corre dá uma olhada porque, pra variar, já tá cômico hahahhaha E se quiser saber algo é só perguntar aqui, lá, aonde achar melhor!! Se gostou dá um like, pra sabermos que gostou, e já se…

View On WordPress