BL Lacertae is a blazar—a kind of galaxy with a supermassive black hole and high-energy jets pointing toward Earth.

A photographer has captured a rare optical phenomenon in the skies above Somerset. Josh Dury spotted the Parhelic Circle on a ...

Molding the flow of light—whether confined to localized regions or propagating in free space—remains crucial for modern ...

Our today’s optical illusion is challenging viewers to spot the number 17 hidden among a colony of 21s and 27s? This tricky visual puzzle, now trending online, challenges your observation skills and ...

Josh Dury, taken from Somerset, U.K. A parhelic circle - an optical phenomenon caused by sunlight reflecting off of ...

An optical illusion is a visual phenomenon where the brain misinterprets what the eyes perceive. It occurs when the ...