GoogleSky

Presented at the Goddard Space Flight Center

Transcript

1. Google Carol Christian & Alberto Conti Space Telescope Science Institute
2. Community Missions Office Marc Postman Carol Christian Alberto Conti Pat Brown
3. CMO Goals Optimize the science from community-led astrophysics missions and projects. Develop, nurture, and share innovations in space astronomy science operations. Collaborate on the next generation of space astrophysics programs.
4. Astronomy Project Timeline A Partial List of Key Astrophysics Facilities 2000 2005 2010 2015 Start date and Probable Duration HST Spitzer Chandra FUSE GALEX GLAST Kepler WMAP JWST SWIFT Beyond Einstein XMM SOFIA INTEGRAL Ares V Flights Herschel - Planck WISE NVO Operations ALMA TMT LSST PANSTARRS NVO Development SDSS VLT & Gemini Observatories SIM? TPF?
5. Astronomy Project Timeline STScI Project and Mission Activity 2000 2005 2010 2015 HST Spitzer Chandra FUSE GALEX GLAST Kepler WMAP JWST SWIFT Beyond Einstein XMM SOFIA INTEGRAL Ares V Flights Herschel - Planck WISE NVO Operations ALMA TMT LSST PANSTARRS NVO Development SIM? TPF? SDSS VLT & Gemini Observatories Start date and Probable Duration
6. Massive amounts of information Computer Science Biology Economics Medicine Government Astronomy
7. Astronomy is changing Old days: photographic plates 1960: astronomical data goes digital New instruments collect 100 GB/night Detectors follow Moore’s Law Total data double every 2 years Growth over 25 years is a factor of 30 in glass, 3000 in pixels ?
8. Challenges 41,253 square degrees or 2 Trillion pixels One wavelength: 4 Terabytes Multi-wavelength: 10-100 Terabytes Time dimension: 10 Petabytes New analysis & visualization tools are required
9. Google Earth Technology Keyhole Grid Google File System Mipmap Clipmap
10. 10 Keyhole Keyhole Markup Language Region 3 Region 2 Region 1 Earth at 1m/pix 226 x 226 image
12. GoogleSky?
13. GoogleSky?
14. GoogleSky?
15. GoogleSky?
16. GoogleSky?
17. GoogleSky?
18. GoogleSky?
19. August 22nd, 2007
20. Base Map Digitized Sky Survey • The National Geographic Society - Palomar Observatory Sky Atlas (POSS-I) • Second POSS (POSS-II) • photographic bands: J, F, N used to generate RGB • Oschin Schmidt & UK Schmidt Telescopes • Plates scanned at STScI Sloan Digital Sky Survey • 2.5-meter telescope on Apache Point • 1/4 of the sky
21. Merging the basemap • Project lat/long • Warp to Earth geodetic coordinates • Account for first order distortions across fields • Match tiles at edges • Color balance adjusted between tiles • Projection causes problems at the poles
22. HST Data Press Release images from HubbleSite • Selected WFP2 and ACS images • Recover World Coordinate System • Overlay image on basemap • Adjust images by hand • Retrieve “bounding box” and rotation • Warp to geodetic
23. PR collection in the NVO • Simple Image Access Protocol (SIAP) • World Coordinate System (WCS) Sky in Google Earth World Wide Telescope
24. Wcs. wcs.computewcs
25. Adding images • Accurate WCS • Warp to Sky astrometry.net or computewcs Add annotation, information, links
26. Metatags • NASA Education Space Science Resource Directory • Astronomy Visualization Metadata (AVM) standard • National Virtual Observatory meta-tags • Automated collection and clustering of tags • Astrophysics Data System • Proposal databases • Visual Faceted Browsing
28. Catalogs • Myriad catalogs • HD, Messier, NGC (built in) • SIMBAD, NED, GSC2, SLOAN, 2MASS, USNOB (add-ons) • Hubble Legacy Archive • Personal Research Cone Search Regionation Sort, cull list
31. GoogleSky DEMO
32. http://hubblesite.org/explore_astronomy/gsky Press Release Video
33. http://bbs.keyhole.com/ubb/postlist.php/Cat/0/Board/sky Share your own files
34. Dr Carol Christian carolc@stsci.edu Dr Alberto Conti aconti@stsci.edu