... To celebrate, consider this remarkable image following the Sun's yearly trek through planet Earth's sky, the first analemmas exposed every day through the technique of solargraphy. ... When does the line between day and night become vertical? ... The Antennae Galaxies in Collision . ... Polar Ring Galaxy NGC 2685 . ... NGC 2685 is a confirmed polar ring galaxy - a rare type of galaxy with stars, gas and dust orbiting in rings perpendicular to the plane of a flat galactic disk. ...