Sunspot of May 10, 28 BCE

The Sunspot of May 10, 28 BCE was a sunspot observed and documented during the Han dynasty in China.

It is among the first documented sunspots.

Description

Han shu : Wuxing zhi: zia ch. 27:

Emperor Cheng of Han, first year of the Heping reign period, third month .... At sunrise the Sun was yellow. There was a black vapor as large as a coin at its center.

Source: East-Asian Archaeoastronomy: Historical Records of Astronomical Observations By Zhenoao Xu, W. Pankenier, Yaotiao Jiang @ books.google.com

See also

• Books of Han
• Sunspot

External links

• Science and technology of the Han dynasty @ Wikipedia
• East-Asian Archaeoastronomy: Historical Records of Astronomical Observations By Zhenoao Xu, W. Pankenier, Yaotiao Jiang @ books.google.com