Astronomy Picture of the Day . The Orion Nebula from Subaru . ... Some stars in the Trapezium, an open cluster of stars at the center, are only visible in infrared light. The orange feature above center is called the Kleinman-Low Nebula, and appears greatly affected by newly forming central star IRc2. ... Welcome to Planet Earth . ... Welcome to Planet Earth, the third planet from a star named the Sun. The Earth is shaped like a sphere and composed mostly of rock. ... The Moon In January . ...