Citation Hunt

Leaderboard

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page André-Louis Danjon:

"

The "Danjon limit", a proposed measure of the minimum angular separation between the Sun and the Moon at which a lunar crescent is visible is named after him.[3] However, this limit may not exist.[citation needed] The Danjon effect is a name given for his observation that there is an increase in the number of "dark" total lunar eclipses during the 11 year solar sunspot maxima. He developed an astrolabe to identify irregularity in the rotational periodicity and concluded that there was increases in the Earth's rotation during intense solar activity. He suggested that the atmospheric darkness might be due to an increase in aerosols in the atmosphere due to increased volcanic activity.[4][5]