Apparent Motion of Venus
All planets in the Solar System revolve around the Sun in a counterclockwise direction when one views them from the north pole of the celestial sphere. Mercury and Venus are inner planets…
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Solar System
Phase of Venus
What is the difference between Geocentric theory and Copernican theory? What is the phase of Venus, which can not be found in the Geocentric theory?
Scale of Solar System
Click the button to move to the planet you want. Is it closer than you think? If not, why?
Galilean Moons
Jupiter, the largest planet in the solar system, has many satellites. Jupiter’s representative satellites include Io, Europa, Ganymede, and Calisto. These four satellites are called Galilean satellites. Galileo observed that these satellites…
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