A theoretical astrophysicist may have solved a nearly two-decade-old mystery over the origins of an unusual 'zebra' pattern seen in high-frequency radio pulses from the Crab Nebula.
Medvedev modeled wave diffraction off a circular reflecting region with radially varying index of refraction outside of it to better understand the Crab Nebula’s zebra pattern.
Freya Castle isn't very large; it's about 20 centimeters (8 inches) across, a little bit larger than the average length of an adult male hand. And its striking, zebra-like pattern of dark and light ...