Numerous ancient Egyptian obelisks remain standing today, most notably at Luxor Temple and the Karnak Temple complex. Some of ...

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 ...

A new study suggests that medieval stone discs found in Ukraine were likely used by Vikings as solar compasses to navigate ...

Learn about the collection of medieval stone disks found in Ukraine and why researchers are speculating on their role as ...

Your watch or clock measures standard time. Your sundial records solar time, which is not the same. According to solar time, noon is when the sun is directly overhead. Even though noon in Boston ...

Nice and compact, they also come with an integrated sundial called the Optimal Sun System for best alignment. The panels performed well, with a consistent 70% output. Most solar panels come in ...

Luxor, located on the east bank of the Nile River in Egypt, is world-renowned for its ancient temples and tombs. However, one ...

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 ...

There’s a helpful sundial-style aiming device in the top corner so you can get maximum solar power. Do that and the BioLite SolarPanel10+ refills its battery from its solar panel relatively quickly.