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Category Archive for: ‘Planets’

The Galilean moons are the four moons of Jupiter discovered by Galileo Galilei in January 1610. They are the largest of the many moons of Jupiter and derive their names from the lovers of Zeus: Io, Europa, Ganymede and Callisto. Ganymede, Europa and Io participate in a 1:2:4 orbital resonance. They are among the most …

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Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the “Red Planet”, as the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a terrestrial planet with a thin atmosphere, having surface …

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Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with a mass slightly less than one-thousandth of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a …

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Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with a mass slightly less than one-thousandth of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a …

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G. J. Garradd (Siding Spring Observatory, Australia) discovered this comet on four images obtained between 2009 August 13.77 and August 13.81. He was using the 0.5-m Uppsala Schmidt telescope and a CCD camera. The magnitude was given as 17.5-17.7 and the coma was described as circular and 15″ across. The first confirmation was obtained by …

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G. J. Garradd (Siding Spring Observatory, Australia) discovered this comet on four images obtained between 2009 August 13.77 and August 13.81. He was using the 0.5-m Uppsala Schmidt telescope and a CCD camera. The magnitude was given as 17.5-17.7 and the coma was described as circular and 15″ across. The first confirmation was obtained by …

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G. J. Garradd (Siding Spring Observatory, Australia) discovered this comet on four images obtained between 2009 August 13.77 and August 13.81. He was using the 0.5-m Uppsala Schmidt telescope and a CCD camera. The magnitude was given as 17.5-17.7 and the coma was described as circular and 15″ across. The first confirmation was obtained by …

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