A phenomenon that changes the moon's appearance from annular (the moon appears visually smaller and is not able to fully cover the sun) to total (when the moon completely covers the sun) and back as the moon's shadow moves across the earth's surface.
The banned Jamaat-ud Dawa has speeded up its campaign of collecting donations via social networking during the holy month of Ramadan. To collect zakat and sadaqa al-fitra the JuD has turned to Twitter and Facebook.