archaeoastronomy

Moon through a Baader Hyperion 36mm Aspheric lens

Tentacles of Doom

SDO AIA 171/193/211 (2011-02-14 11:36:01 UTC)

SDO AIA 193 (2011-02-14 11:36:01 UTC)

SDO AIA 304 (2010-12-01 11:33:49 UTC)

Heliacal Rising

A planet's elliptical orbit around a star

Dolphin Watching in Ancient Greece (Part 4/4)

Dolphin Watching in Ancient Greece (Part 3/4)

Dolphin Watching in Ancient Greece (Part 2/4)

Dolphin Watching in Ancient Greece (Part 1/4)