Astronomers explain that the Sun looks darkened during a partial eclipse because the Moon essentially "bites" into it. The degree of darkness depends on how much of the Sun’s surface is obscured from a given location on Earth.

September 2025 Date, Timings Today Live Updates: The last solar eclipse of the year will take place on today (September 21, 2025), just a day before the September equinox. While this Surya Grahan will not be visible in India,

Partial eclipses often happen multiple times per year and are more common than total eclipses. The most recent partial solar eclipse was visible on March 29. Just two weeks ago, Asia experienced a total lunar eclipse, where the Earth's shadow blocked the moon from reflecting light.