... Mercurys Transit: An Unusual Spot on the Sun . ... Usually it is the Earth's Moon that eclipses the Sun. ... Mercury and the Chromosphere . ... As a bright November Moon lit up the night sky last week, Gil Esquerdo spotted this lovely Moon halo overhead at the Whipple Observatory on Mt. ... Janus: Potato Shaped Moon of Saturn . ... First, Janus travels in an unusual orbit around Saturn where it periodically trades places with its sister moon Epimetheus, which typically orbits about 50 kilometers...