First observed between August 4 and August 6, 1181, Chinese and Japanese astronomers recorded the supernova now known as SN 1181 in eight separate texts.
An amateur astronomer has recorded images of the out-of-control US satellite as it tumbles back to Earth.
In preparatory observations in July 1999, the astronomers recorded what they said was possibly another impact flash.
Early astronomers, using small telescopes, recorded the changing appearance of Jupiter's atmosphere.
Before and after each series of observations using a C.C.D. detector, astronomers record the electronic output of a darkened C.C.D.
Among these measurements when astronomers recorded the times, there were personal differences in calculation.
Chinese astronomers record the sudden appearance of a bright star.
Many famous astronomers, including Percival Lowell, recorded them.
In 185 CE, Chinese astronomers recorded the appearance of a bright star in the sky, and observed that it took about eight months to fade from the sky.
Supernova SN 1054 was another widely-observed event, with Arab, Chinese, and Japanese astronomers recording the star's appearance in 1054 CE.