astrophotography by bill w

I chose Casper Wyoming for the eclipse for several reasons: 1 historically it had the greatest chance of clear skies at that time and date...

First here's a different version of an image of the faint outer detail of the corona (be sure to click on images for full size):  8...

partial phase, moon about to gobble up spots: a few sunspots are noted in the photosphere, the bright visible surface of the sun.   alm...

if you look at the top of the planet, you get a hint of an angular structure at the north pole, rather than a circle, but i'm pretty su...

like the earth, the sun itself rotates.  its period is once every 24 days at the equator, but only once every 35 days at the poles.  this wa...

on 6/17/17 Jupiter put on a show: both io and ganymede transited jupiter's face while the great red spot was showing.  unfortunately, t...

variety pack of images: solar prominence 7/8/17 (occulted) Hydrogen alpha H alpha composite Ha exclusion Ha colorized com...