astrophotography by bill w

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...

in testing a tracking mount for the eclipse, i encountered an unpleasant surprise: the sun is brighter in the summer!  so bright that the s...

finally able to take advantage of larger aperture for a higher magnification jupiter Jupiter 5/28/17 still a bit mushy, but showing so...

the bright star in the east after dark (which is pretty late these days) is in fact Jupiter.  seeing has been lousy this season, but i ...

Here's starburst nebula NGC 1569 in hydrogen (Ha) and oxygen (OIII) this sat on my hard drive for a year as i was initially disappoi...