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The Solar System Aide Memoire • How to remember the sequence of the Planets:• Mercury = Many • Venus = Virgins • Earth = Enter • Mars = Marriage • Jupiter = Just • Saturn = Supposing • Uranus = Upon • Neptune = New • Pluto = Pleasures • Pluto, by the way is no longer considered a Planet Size of the Planets relative to the Sun Size of the Planets relative to the Sun Planet size relative to each other Size of the Sun relative to the Stars Size of the Sun relative to the Stars The Seasons Spring Equinox March 21st Summer Solstice Winter Solstice June 21st December 21st SUN Perihelion Aphelion Autumn Equinox September 21st A little video for you! The Earth & Observer Centred View of the Universe Apparent Motion 23.5 Libra NP PN Earth Equinoctial PS SP 23.5 23.5 First Point of Aries Co-ordinates of the Celestial Sphere PN Celestial Greenwich Meridian SHA GHA Body Parallel of Declination DEC Equinoctial SHA Aries GHA of ARIES Celestial Meridian through Body Celestial Meridian through First Point of ARIES PS G Relating Apparent Daily Motion of the Celestial Sphere to the Earth PN SHA Obs GHA GHA G LHA [...].. .Apparent Motion 23.5 Libra NP PN Earth Equinoctial PS SP 23.5 0 23.5 0 First Point of Aries 0 Co-ordinates of the Celestial Sphere PN Celestial Greenwich Meridian SHA GHA Body Parallel of Declination DEC Equinoctial SHA Aries GHA of ARIES Celestial Meridian through Body Celestial Meridian through First Point of ARIES PS G Relating Apparent Daily Motion of the Celestial Sphere