 |
|
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
| • HOME • ABOUT • CATEGORIES • USE OF TEXT AND IMAGES • NEWSLETTER   
|
solar rotation number
A parameter used by solar observers in describing their data. The system starts, for historical reasons, with rotation #1 on November 9, 1854, and a new rotation begins when the solar central meridian is equal to zero (that is, the Sun has made one apparent rotation). This takes, on average, about 27.275 days.
Related category
• SOLAR TOPICSAlso on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History