claim: Firefox is a browser.
evidence: The Soap Bubble Nebula , or PN G75 .5 +1.7 , is a planetary nebula in the constellation Cygnus , near the Crescent Nebula -LRB- NGC 6888 -RRB- .. Cygnus. Cygnus ( constellation ). planetary nebula. planetary nebula. Crescent Nebula. Crescent Nebula. It was discovered by amateur astronomer Dave Jurasevich using an Astro-Physics 160 mm refractor telescope who imaged the nebula on June 19 , 2007 and on July 6 , 2008 .. The nebula was later independently noted and reported to the International Astronomical Union by Keith .. International Astronomical Union. International Astronomical Union. B. Quattrocchi and Mel Helm who imaged PN G75 .5 +1.7 on July 17 , 2008 .