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Galileo Galilei

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Q: Who was the first astronomer to see the phases of Venus?
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Can you see the phases of any planets from Earth?

Venus has phases that can be seen from Earth. See related link for a pictorial.


What planets are seen in phases like the moon?

Both Mercury and Venus, being closer to the sun than us, will show phases. When Venus is at is brightest it is generally just a bit over half full. If you were on Mars, you would note phases on earth.


What helped provide evidence that the planets orbit around the sun rather than the earth?

We sometimes see gibbous (nearly but not quite full) Venus. In the Ptolemaic system, we should never see more than a crescent in Venus. Because we do in fact see more, the Ptolemaic model must be wrong. The full range of phases that we see for Venus is consistent only with the idea that Venus orbits the Sun. Galileo was the first to observe the phases of Venus - and hence to find this evidence in support of the Sun-centered system - because he was the first to observe Venus through a telescope. Without a telescope, we cannot tell that Venus goes through phases.


Why does Venus have phases like the moon?

You know how the moon rotates around the Earth, and has phases because of the suns rays hitting its crust? Its the same with Venus. You know that Venus revolves around the sun, right? But did you know that it also has phases? Its true. Anyway, Venus's phases are just like the moons. I don't know why Venus has phases, but I sure do know how.;)


What phases of venus are predicted by the ptolemaic system?

New and crescent phases only. The crescent phase can not quite reach the stage where we see half a hemisphere of Venus illuminated.


Does Mars go through phases similar to the moon?

Only partly. We never see Mars in a crescent or new phase, just the full and gibbous phases. That's because Mars is farther away from the Sun than the Earth is, so we never see it "inside" our orbit. On the other hand, we see the crescent and gibbous phases of the planet Venus, but never the full or new phases, because when Venus would be "new", it's too close to the Sun to be observed - and when Venus would be "full", it's on the other side of the Sun, and not visible!


How did Galileo discover the planet Venus's?

He did not discover the planet Jupiter. He only used his telescope to see its four largest moons. The planet is and always has been visible to the naked eye and was known to people since ancient times.


Can you see other planets phases?

The easiest phases to see are those of Venus when it comes close to Earth as it overtakes us in its orbit. At that time it is very bright and the crescent phase can be seen in a small telescope.


What would altered conditions in electrophoresis do?

who was the first astronomer to see mountains on the moom


Why do planets have phases similar to lunar phases?

The planet Venus has phases similar to the moon's phases because of its orbit around the sun, inside the orbit of the Earth. Because of its particular orbit, an observer from the earth is?æable to see various phases.


Does anything else go through phases besides the moon?

Yes. Mercury and Venus have phases. We can't really observe phases for the outer planets, because we always see the bright side, since we are on the same side as the Sun. Any asteroid that gets near enough could also have phases.


Do objects other than the Moon show phases?

Yes. Specifically, such phases can be seen on Mercury and Venus. Mars and other planets that are further out are "almost-full", due to the fact that they are further away from the Sun. You could also see phases on asteroids, if they are in an appropriate position, and you use telescopes that are powerful enough.