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.
Moon & Venus.
New and crescent phases only. The crescent phase can not quite reach the stage where we see half a hemisphere of Venus illuminated.
Venus has phases that can be seen from Earth. See related link for a pictorial.
Well yes and no. The phases of the moon were understood well before Galileo --- however Galileo discovered the moons of Jupiter and no doubt their associated phases --- as well as the phases of Venus.
venus has 4 phases
Why would Ptolemy not explain venus phases
Venus has no moons.
No. He discovered the phases of venus.
Galileo Galilei first recorded phases in Venus in 1610, and published his findings in 1613.
The phases of the planet Venus are the different variations of lighting seen on the planet's surface
Venus has 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.;)
Venus
Phases
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.
The phases of Venus are well supported by the heliocentric system, but they are also supported very well by the previous geocentric system. All you need for Venus to have phases is that Venus should pass between Earth and Sun. That happens in both the heliocentric system and the geocentric system.