Mercury, being an inner planet, does not exhibit phases like the moon does. However, it does appear to go through phases when observed from Earth due to its changing position relative to the Sun.
The phases of the planet Venus are the different variations of lighting seen on the planet's surface
]
Venus
Your question is incoherent.
It would be called a moon or, more formally, a natural satellite. In such a case, though it would not be considered a planet as it orbits a planet rather than a star.
The changes in shape that the moon goes through are called phases.
The phases of the planet Venus are the different variations of lighting seen on the planet's surface
In order for a planet to exhibit a crescent phase as seen from earth, it has to be closer to the sun than we are, meaning that its orbit has to be 'inside' the earth's orbit. For that reason, only Mercury and Venus can show crescent phases. But every planet can show phases where the illuminated portion appears to be 50% or more of the full disk.
Yes, though he goes to Earth in Sonic X, and I think he also goes there in some of the newer games. (They don't tell you where those games take place.)
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.
All of the planets show "phases", in which only part of the planet is illuminated. However, only Venus and Mercury, as "interior" planets, go through the complete new/crescent/gibbous/full cycle.