View source for 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 ==

[[Books of Han|Han shu]] : Wuxing zhi: zia ch. 27:

<blockquote>
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.
</blockquote>

Source:  [https://books.google.com/books?id=9JatFvikiwQC&pg=PA152&lpg=PA152&dq=sunspot+china+may+10&source=bl&ots=YC35aQeMfp&sig=tw3RDtbxd4du3KSvMRlco4ntB4U&hl=en&sa=X&ved=0ahUKEwi9gtz-kdLMAhVH8IMKHbRNAdYQ6AEILzAD#v=onepage&q=sunspot%20china%20may%2010&f=false 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 ==

* [https://en.wikipedia.org/wiki/Science_and_technology_of_the_Han_dynasty#Astronomical_observations Science and technology of the Han dynasty] @ Wikipedia
* [https://books.google.com/books?id=9JatFvikiwQC&pg=PA152&lpg=PA152&dq=sunspot+china+may+10&source=bl&ots=YC35aQeMfp&sig=tw3RDtbxd4du3KSvMRlco4ntB4U&hl=en&sa=X&ved=0ahUKEwi9gtz-kdLMAhVH8IMKHbRNAdYQ6AEILzAD#v=onepage&q=sunspot%20china%20may%2010&f=false East-Asian Archaeoastronomy: Historical Records of Astronomical Observations] By Zhenoao Xu, W. Pankenier, Yaotiao Jiang @ books.google.com


[[Category:Astronomy]]
[[Category:Light]]