... A telescopic mosaic, it features well-known bright nebulae and star clusters cataloged by 18th century cosmic tourist Charles Messier. Cloud, Clusters and Comet Siding Spring . ... Then, this inbound visitor (C/2013 A1) to the inner solar system, discovered in January 2013 by Robert McNaught at Australia's Siding Spring Observatory, will pass within 132,000 kilometers of the Red Planet. M6: The Butterfly Cluster . ... Holometer: A Microscope into Space and Time . ... The Wizard Nebula . ...