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What Is The Green Flash Phenomenon?

The image above shows a dramatic example of a green flash, as seen from the Canary Islands. While this particular…

Peter Christoforou

New Study Doubles the Milky Way’s Diameter

The image above shows an annotated map of the Milky Way, based on recent distance measurements to distant stars located…

Peter Christoforou

New Finding Resolves One More Mystery about How Massive Galaxies Form

The upper panel in the image above shows the observed average movements of stars within two sample galaxies. The image…

Peter Christoforou

Why Pluto’s Dunes Are Similar to Those on Earth

The image above, taken by the New Horizons space probe in July of 2015, shows some detail of an extensive…

Peter Christoforou

What is The Belt of Venus Atmospheric Phenomenon?

The image above shows the Belt of Venus, a rosy-hued band of light between Earth’s shadow and the upper atmosphere…

Peter Christoforou

Why We May Not Want To Visit Some Exoplanets

The image above shows an artists’ impression of the exoplanet Kepler-452b, the first exoplanet that was found to orbit a…

Peter Christoforou

Making Stuff in Space: Off-Earth Manufacturing is Just Getting Started

Space is a perilous place for humans to inhabit: microgravity slackens our muscles and upsets our fluid balance, radiation threatens…

Peter Christoforou

Examining the Phenomenon of Lunar Rainbows

The image above shows an example of a moonbow that appeared over Maui, Hawaii in February 2016. Note that although…

Peter Christoforou

The Night Sky This Month: June 2018

The summer solstice occurs on June 21st, which is the longest day of the year and officially marks the start…

Peter Christoforou

What Are Sun Dogs and How Are They Caused?

The image above shows a pair of bright sundogs as seen from the city of Fargo in North Dakota. Also…

Peter Christoforou