astrophotography by bill w

Gravitational lensing is a phenomenon predicted by einstein's general theory of relativity wherein the warp in space due to the gravita...

North America and Pelican Nebulae The North America Nebula is a huge emission nebula in Cygnus close to the bright star Deneb. It took me...

Having recently moved I've noticed some improvement in my skies from bortle white to bortle "off white".  At zenith on a good ...

finally finished the animation of the partial eclipse in hydrogen alpha. imaged over about two hours. a "usb fault" caused me ...

here's a wider view of the monster sunspot grouping i caught just before the recent partial eclipse. according to one source, this grou...

why call it a silhouette when i can be trendy? if you look around while the sun is partially eclipsed, you may notice strange things in the...

as usual, the sun has upstaged the moon, producing the largest sunspot folks have seen in years at the same time as the partial solar eclips...