Astronomy Picture of the Day . ... All the Colors of the Sun . ... It is still not known why the Sun's light is missing some colors. ... 3D Barringer Meteorite Crater . ... Baringer Meteorite Crater, near Winslow, Arizona, is one of the best known impact craters on planet Earth. View this color stereo anaglyph with red/blue glasses to get a dramatic sense of the crater's dimensions -- one mile wide, and up to 570 feet deep. ... Eris: More Massive than Pluto . ... Monitoring M2-9 . ...