Astronomy Picture of the Day . ... Credit Copyright: Dennis di Cicco ( TWAN ) Sean Walker, Skyandtelescope.com Explanation: Intricate, glowing nebulae that shine in planet Earth's night sky are beautiful to look at in deep images made with telescopes and sensitive cameras. ... With a total exposure time of 40 hours, the painstaking mosaic presents a nebula-rich expanse known as the Orion-Eridanus Superbubble above a house in suburban Boston, USA. ... Publications with keywords: nebula - Orion . ...