On what planet was a large rectangular outcrop that is composed mainly of sandstone first observed by an English astronomer born 1618?
Horrocks Block Horrocks Block ( ) is a large rectangular outcrop that is composed mainly of sandstone, lying on the north side of Venus Glacier, 2 nmi southwest of the Keystone Cliffs, on the east side of Alexander Island, Antarctica. It was mapped by the Directorate of Overseas Surveys from satellite imagery supplied by the U.S. National Aeronautics and Space Administration in cooperation with the U.S. Geological Survey, and was named by the UK Antarctic Place-Names Committee from association with Venus Glacier after Jeremiah Horrocks, the British astronomer who predicted and first observed a transit of Venus, in 1639.
Kepler-47b Kepler-47b (also known as Kepler-47(AB)-b and by its Kepler Object of Interest designation "KOI-3154.01") is an exoplanet orbiting the binary star system Kepler-47, the innermost of three such planets discovered by NASA's "Kepler" spacecraft. The system, also involving two other exoplanets, is located about 4,900 light-years (1,500 parsecs, or nearly km) away in the constellation Cygnus. The binary system is the first to be found with more than one circumbinary planet.