Asteroid 2023 JF flew about 199,000 miles (320,000 km) away from Earth. It's estimated size is about 34 feet wide (10 meters) ...

Oxygen is crucial for life as we know it, but before it could build up in our atmosphere, earth had to slow down. Hosted by: Hank Green Huge thanks go to the following Patreon supporters for helping ...

Abstract: This article presents a novel transmission-only calibration technique for free-space quasi-optical material characterization, based on rotating the sample around its axis to vary the angle ...