On Mar 9, 1611, Dutch astronomer Johannes Fabricius discovered sunspots.

On Mar 9, 1611

Dutch astronomer Johannes Fabricius discovered sunspots.

Sunspots are regions of reduced surface temperature on the sun.

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Feb 18, 1930

American astronomer Clyde Tombaugh discovered Pluto.

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The first pizza party was held in space.

Sep 23, 2018

The Japanese Space Agency sent two robots to explore an asteroid aboard their Hayabusa-2 spacecraft.

Dec 27, 2004

Radiation from an explosion on the magnetar SGR 1806-20 reached Earth.

Mar 4, 1986

The Soviet Union's Vega 1 Space Probe began sending back images of Halley's Comet.

What Happened on Mar 9?

What Happened in 1611?