The Far Infrared Sky . ... Credit Copyright: E. L. Wright ( UCLA ), COBE , DIRBE , NASA Explanation: Three major sources contribute to the far- infrared sky : our Solar System , our Galaxy, and our Universe . ... Our Solar System is evidenced most prominently by the S-shaped blue sash called zodiacal light , created by small pieces of rock and dust orbiting between the Sun and Jupiter . ... Clouds and filaments of dust in our Milky Way also make intricate patterns pervading most of the sky. ...