The moon causes solar eclipses. Our lunar neighbour passes between the sun and Earth, casting a shadow.
In a partial eclipse, only a portion of the sun is blocked, so the sun's circle looks darkened.
Location, timing, and weather affect eclipse viewing (keep your fingers crossed for clear skies).
If you're in the eclipse path, use Timeanddate's eclipse lookup or the interactive map to find your viewing time.
Even if you're in the wrong place, you're lucky. Virtual Telescope Project will livestream the Oct. 25 eclipse at 2 a.m. PT.
If you're lucky enough to see the eclipse in person, take precautions. Sunglasses are essential.