... Hickson 44 in Leo . ... Scanning the skies for galaxies, Canadian astronomer Paul Hickson and colleagues identified some 100 compact groups of galaxies, now appropriately called Hickson Compact Groups. ... Yes, but how many dark clouds have a multicolored lining? ... TrES 2b: Dark Planet . ... Why is this planet so dark? Planet TrES-2b reflects back less than one percent of the light it receives, making it darker than any known planet or moon, darker even than coal. ... The Fairy of Eagle Nebula . ...