The Sun is the at the center of the . It is a massive, nearly perfect of hot , heated to by reactions in its core, radiating the energy from its mainly as and with 10% at energies. It is by far the most important source of energy for on . The Sun has been an in many cultures. It has been a central subject for astronomical research since . As a star, the Sun doesn’t have any moons, but the planets and their moons orbit the Sun.
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Although better remembered for mapping the Moon, and were the first areographers. They began by establishing that most of Mars's surface features were permanent and by more precisely determining the planet's rotation period. In 1840, Mädler combined ten years of observations and drew the first map of Mars.
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Moons in our Solar System include12:Earth's MoonMars Moons: Deimos, PhobosJupiter Moons: Amalthea, Callisto, Europa, Ganymede, IoSaturn Moons: Dione, Enceladus, Hyperion, Iapetus, Mimas, Phoebe, Rhea, Tethys, TitanUranus Moons: Ariel, Miranda, Oberon, Titania, UmbrielNeptune Moons: Nereid, Triton
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