Hack a Day’s very own [Jack Buffington] is throwing his hat into the ring for the Buildlounge laser cutter giveaway with his solar clock that isn’t a sundial. The theory behind [Jack]’s ...

The discs share similarities with wooden solar compasses found across Europe, including markings characteristic of sundial-compasses. Researchers compared the pyrophyllite discs with other ...

For working and camping off-grid, portable solar panels help you ditch the noise and fumes of generators. Here's what to know, plus our favorites.

Sundial time is the true solar time at our location equal to the hour angle of the Sun (plus 12 hours since LAST begins at midnight rather than noontime). From your adjustment for Mean Solar Time, ...

The horizontal lines measured the length of the shadow of the gnomon. The 13 horizontal lines read the 24 julgi, solar terms. There were only 13 to represent the 24 solar terms since the length of the ...