Astronomy Picture of the Day . An Earth Ornament . ... The Apollo 8 astronauts spent the 1968 Christmas Season orbiting the Moon, returning with striking images of both Moon and Earth from space - pictures which inspired the world. ... How would you like to spend your holiday in low earth orbit? ... Lava Fountain on Jupiter's Io . ... Accretion Disk Binary System . ... Our Sun is unusual in that it is alone - most stars occur in multiple or binary systems. ... Irregular Galaxy Sextans A . ...