In April, the American Red Cross asks people to keep patients top of mind by making an appointment to give blood or platelets ...

The ionosphere is of great importance to shortwave radio transmissions, since it allows radio waves to be refracted and ...

The northern lights continue, and if you’re in the right location, you might just catch them glimmering in the night sky ...

From classrooms to backyards, makers are building Arduino-powered solar trackers to squeeze every drop of energy from the sun. These devices use sensors, motors, and clever designs to keep panels ...

Working with multiple sensors on an Arduino can unlock richer, more interactive projects. By integrating motion, light, distance, and environmental readings, you can create systems that respond ...

Tonight is "blue moon Eve" (see the May 31 entry for more details). Late tonight, look toward the southeast to see one of the ...

Pulsating auroras are not particularly rare. They are commonly associated with powerful auroral substorms that occur somewhat ...

The Dark Energy Spectroscopic Instrument spent five years observing the sky from Arizona. Now, researchers have a trove of ...