Brass foot tool in painted tinplate case used by William Herschel to polish his metal speculum mirrors used in his telescopes. Brass foot tool in painted tinplate case 1770-1820
Pitch polisher used by William Herschel to polish his metal speculum mirrors used in his telescopes. Pitch polisher 1770-1820
Venus globe, 12-inch diameter with plastic stand by Replogie Globes Inc., supplied through Sky Publishing Corporation. Colour coded relief details obtained from doppler radar measurements made using a spacecraft in orbit around the planet, Broadview, Chicago, Illinois, United States, 1995 Venus globe
Photograph of a pastel drawing of the Ring Nebula (M57) in Lyra from observations by Prof. E.S. Holden, dated Oct 25th 1875, using telescopes of the United States Naval Observatory at Foggy Bottom, Washington, DC. Photograph of a pastel drawing of the Ring Nebula in Lyra