Archives: Timeline Events

Dirk Brouwer, namesake of the AAS Division of Dynamical Astronomy’s Dirk Brouwer Career Award

Dirk Brouwer, namesake of the AAS Division of Dynamical Astronomy's Dirk Brouwer Career Award, describes how errors compound when numerically integrating planetary orbits.

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Kiyotsugu Hirayama publishes observations of asteroids

Kiyotsugu Hirayama publishes observations of asteroids with unusually closely spaced orbits, kick-starting the study of asteroid families.

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The American Astronomical Society is founded

The American Astronomical Society is founded

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Asaph Hall III, the discoverer of Mars’s moons Phobos and Deimos

Asaph Hall III, the discoverer of Mars's moons Phobos and Deimos, notes the anomalous precession of Mercury's orbit and calls into question Newtonian gravity.

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The fifth known moon of Jupiter

The fifth known moon of Jupiter, today called Amalthea, is discovered.

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