Why is the Sky Blue?

As sunlight passes through our atmosphere, its energy becomes scattered in various directions. Shorter wavelength light waves such as blue tend to disperse more widely than their red counterparts. John Tyndall and later Lord Rayleigh helped reveal why the sky appears blue. What is the colour of the sky? Rayleigh scattering is responsible for creating…

How Often Do Red Moons Occur

People have long been afraid that seeing a red Moon signals the start of an imminent catastrophe, yet this phenomenon simply results from passing through Earth’s umbra (shadow). Umbral light passes through Earth’s gaseous atmosphere and is scattered in green and violet wavelengths that combine into coppery red hues, giving an overall coppery red tint….

What Happens When Saturn Loses Its Rings?

Astronomers have long known that Saturn’s iconic rings are gradually dissolving, potentially within 100 million years. Recent research based on data collected by NASA’s Cassini probe indicates this trend is occurring even faster than predicted. What happens if Saturn loses its rings? What are the rings made of? Saturn’s rings are composed of rock, ice…