July 24, 2014

AstroEvent: A Very Looong Annular Eclipse!

Animation of the Annular Eclipse on January 15th, 2010.

Animation of the Annular Eclipse on January 15th, 2010. (Credit: NASA/A.T. Sinclair).

††††††††† One of the more unique celestial events on the calendar for 2010 occurs on Friday, January 15th; an annular eclipse of the Sun, and the longest for the millennium! An annular solar eclipse occurs when the moon is at or near apogee (its most distant point from the Earth) and/or the Earth is at or near perihelion (its closest approach to the Sun)Ö these happened on January 17th and January 2nd respectively, setting us up for a visually large Sun and correspondingly small Moon, small enough that it wonít completely cover the Sunís disk.†† The maximum possible duration for an annular eclipse is 12 minutes and 24 seconds and the actual maximum for this eclipse is 11 minutes and 7.7 seconds, which occurs off of the southwestern coast of the Indian subcontinent. [Read more...]