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Talks about the universe as we know it starting with a small singularity, then inflating over the next 13.8 billion years to the cosmos that we know today.
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Approximately 400,000 years after the Big Bang, the universe cooled down enough for these ions to recombine into atoms, enabling the first light in the cosmos, that from the Big Bang, to finally shine. However, what came next were the dark ages of the universe — there was no other light, as the stars were not born yet.[Infographic Tour: History & Structure of the Universe]
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The solar system formed at about 9.2 billion years, with the earliest traces of life on Earth emerging by about 9.8 billion years.
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Johann Galle observes and discovers Neptune. His observations were prompted by mathematical calculations by French astronomer Joseph Leverrier and English astronomer John Couch Adams.
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The discovery of Uranus by Herschel
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Christian Huygens discovers Saturn's rings and Titan, the fourth satellite of Saturn.
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Galileo uses telescope for astronomical purposes. He discovers 4 Jovian moons, the Moon's craters and the Milky Way galaxy.
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Aristarchus suggests the Earth revolves around the Sun. He provides first estimation of Earth-Sun distance.
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New evidence found for water on Mars.
