Sun spots:
Michael said...
I use a pair of binoculars, aligned so the sun comes through them and is projected onto a piece of paper. You actually have to focus the binoculars in order to get a sharp image.
I'm holding the binoculars against the windowsill to steady them, and by my foot is a clipboard with a piece of white paper, onto which the sun is projected.
If there are sunspots, you can see them clearly.
