astrophotography by bill w

Here are 4 images over 6 years showing the expansion of the crab nebula, a supernova remnant.  Extrapolating the expansion back to ti...

On July 4th 1054 AD, astrologers observed a bright blue square in the sky near the sun at dawn. it was visible during the day for 3 weeks an...

  this is the year of the solar maximum--maximum sun spot activity in the 11 year solar cycle. 10 pm pacific today 6/20/13 is the summer sol...

interrupting the planetary overview. lot's of solar activity on mother's day here's a close up with the bright disk blocked ...

will skip earth and the moon for now and move on to the 4th planet from the sun Mars aka the red planet mars is a small planet, about half t...

Venus, about the same size as earth the second planet from the sun rocky, but covered with white clouds which make it one the brightest...

continuing with the planet tour mercury closest planet to the sun fastest in orbit circling the sun in 88 days named after the fleet ...