Tag Archives: Kepler

today’s birthday: Johannes Kepler (1571)

Johannes Kepler (1571)

Described by famed astronomer Carl Sagan as “the first astrophysicist and the last scientific astrologer,” Johannes Kepler was a German astronomer, mathematician, and astrologer. A key figure in the scientific revolution, Kepler derived three famous laws of planetary motion, which, among other things, established that the planets travel around the Sun in elliptical rather than circular orbits. When Kepler was six, his mother, who was later tried for witchcraft, took him to see what phenomenon? More… Discuss


Astronomical Transit

An astronomical transit is the passage of a celestial body or satellite across the face of a relatively larger body. Transits are not the same thing as the familiar solar or lunar eclipse. In an eclipse, a large celestial body hides a major part of a smaller body. In an astronomical transit, a small body crosses in front of a larger one. An astronomical transit can involve two planets, but this has not been observed on Earth since 1818. When will the next planetary transit be visible from Earth? More… Discuss


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