The efficiency of LED light has been a boon for humanity, and a bane for astronomers.
How To Build A Pinhole Camera, And Why It Works
Pinhole cameras are easy to build, and great for viewing the solar eclipse.
Syzygy
What does syzygy mean in astronomy?
Millions In Motion
We can now observe the motions of millions of stars through the sky.
What We Really See
What astronomers observe, and what people think they observe are very different.
How Green Was My Meteor
Lots of objects in the night sky are green, but they are green for a variety of different reasons.
Wonderful Precision
The level of precision in astronomical data is amazing.
Here Be Dragons
The laws of physics conspire to keep you trapped within a black hole. You could no more escape a black hole than you could walk backwards in time.
Too Big To Fail
Cosmic rays are powerful. Too powerful, in fact.