The Observer's Handbook contains a number of recommended links to additional astronomy resources. This page includes live hyperlinks that will allow you to access these resources more easily. Happy exploring!
- Access the websites listed in Selected Internet Resources on page 15 of the 2020 Observer’s Handbook.
- Access all the websites listed in the 2020 Observer’s Handbook, listed by page.
- Access the websites listed in in the body of the 2020 USA Edition Observer’s Handbook where they differ from the standard edition.
Selected Internet Resources
From Page 15 of the 2020 Observer's Handbook
| www.aavso.org | American Association of Variable Star Observers (p. 298) |
| www.alpo-astronomy.org | Association of Lunar and Planetary Observers (p. 221) |
| astrosociety.org | Astronomical Society of the Pacific (p. 18) |
| www.astronomy.com | Astronomy magazine (p. 10) |
| www.asc-csa.gc.ca | Canadian Space Agency |
| www.cleardarksky.com/csk | Clear Sky Chart, by Attilla Danko (p. 78) |
| astronomerswithoutborders.org | Astronomers Without Borders |
| www.MrEclipse.com | Eclipse photography and safety (p. 143) |
| heritage.stsci.edu | Hubble Heritage Site, access to HST images |
| www.cbat.eps.harvard.edu/index.html | International Astronomical Union Central Bureau (p. 7); see also www.iau.org |
| darksky.org | International Dark-Sky Association (p. 79) |
| www.imo.net | International Meteor Organization (p. 254) |
| occultations.org | International Occultation Timing Association (p. 163) |
| www.jpl.nasa.gov | Jet Propulsion Laboratory, activities for adults and kids |
| fireball.amsmeteors.org/ members/imo/report_intro/ |
American Meteor Society (p. 256) |
| ui.adsabs.harvard.edu | NASA Astrophysics Data System (ADS); bibliographic database, access to millions of articles |
| eclipse.gsfc.nasa.gov/eclipse.html | NASA eclipse site (p. 143) |
| ned.ipac.caltech.edu | NASA/IPAC Extragalactic Database (p. 334) |
| spaceflight.nasa.gov | NASA space flight site giving current information on Space Shuttle missions and ISS activities |
| www.rasc.ca/handbook | Observer's Handbook Web site (ifc) |
| planetary.org | Planetary Society—contains over 2000 pages of information about space exploration |
| www.rasc.ca | The Royal Astronomical Society of Canada (p. 7) |
| saguaroastro.org | Saguaro Astronomy Club, includes observing list database (p. 87) |
| www.heavens-above.com | Satellite tracking information, including International Space Station |
| simbad.u-strasbg.fr/simbad | SIMBAD astronomical database |
| skyandtelescope.org | Sky & Telescope and Sky Publishing (p. 10) |
| skynews.ca | SkyNews-Canada's astronomy magazine published by the RASC (p. 10) |
| www.stsci.edu | Space Telescope Science Institute; access to Digitized Sky Survey |
| seds.org | Students for the Exploration and Development of Space |
| vizier.u-strasbg.fr/viz-bin/VizieR | VizieR service; access to most astronomical catalogues |
Web Resources
Page-by-Page Listing of Web Resources, other than page 15 of the 2020 Observer's Handbook
| http://wis-tns.weizmann.ac.il//user/register | p. 7 | Transient Name Server |
| www.minorplanetcenter.net/iau/info/TechInfo.html | p. 7 | Minor Planet Reports |
| iopscience.iop.org | p. 10 | Publications of the Astronomical Society of the Pacific |
| www.apple.com/itunes | p. 10 | Apple iTunes |
| appworld.blackberry.com/webstore | p. 10 | Blackberry Apps World |
| www.microsoft.com/en-us/windows/windows-10-apps | p. 10 | Windows Store |
| market.android.com | p. 10 | Android Market |
| portico.org/stable?au=pgg3ztf87mt | p. 10 | Andrew Fraknoi’s article in Astronomy Education Review |
| www.earthandsky.co.nz | p. 11 | Mount John Observatory—Lake Tekapo, New Zealand |
| www.aao.gov.au | p. 11 | Australian Astronomical Observatory—Siding Spring, Australia |
| rsaa.anu.edu.au/observatories | p. 11 | Mount Stromlo Observatory—Canberra, Australia |
| www.perthobservatory.com.au | p. 11 | Perth Observatory—Bickley, Australia |
| www.mpifr-bonn.mpg.de/effelsberg | p. 11 | Effelsberg Radio Telescope—Effelsberg, Germany |
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www.rmg.co.uk/royal-observatory
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p. 11 | Greenwich Observatory—Greenwich, England |
| www.jodrellbank.manchester.ac.uk | p. 11 | Lovell Radio Telescope—Jodrell Bank, England |
| www.armagh.space | p. 11 | Armagh Observatory—Armagh, Northern Ireland |
| birrcastle.com/telescope-astronomy | p. 11 | “Leviathan” Great Telescope—Birr, Ireland |
| www.ing.iac.es/Astronomy/ telescopes/int |
p. 11 | Isaac Newton Telescope—La Palma, Canary Islands |
| stjohnsrasc.ca/bpsp/star-party.shtml | p. 11 | Butterpot Star Party—Butter Pot Prov. Park, Newfoundland |
| www.ap.smu.ca/pr/bgo | p. 11 | Burke-Gaffney Observatory—Halifax, Nova Scotia |
| novaeast.rasc.ca | p. 11 | Nova East—Smileys Provincial Park, Nova Scotia |
| halifax.rasc.ca/index.php/observing/14-st-croix-observatory | p. 11 | St. Croix Observatory—St. Croix, Nova Scotia |
| https://www.deepskyeye.com | p. 11 | Deep Sky Eye Observatory—Quinan, Nova Scotia |
| outreach.naic.edu/ao | p. 11 | Arecibo Observatory—Arecibo, Puerto Rico |
| www.eso.org/public/teles-instr/paranal-observatory | p. 11 | Paranal Observatory (ESO)—Cerro Paranal, Chile |
| www.lco.cl | p. 11 | Las Campanas Observatory—Cerro Las Campanas, Chile |
| https://www.gemini.edu | p. 11 | Gemini South Observatory—Cerro Pachon, Chile |
| www.eso.org/sci/facilities/lasilla.html | p. 11 | La Silla Observatory—Cerro La Silla, Chile |
| www.ctio.noao.edu | p. 11 | Cerro Tololo Inter-American Observatory—Cerro Tololo, Chile |
| omm.craq-astro.ca | p. 11 | Mont Mégantic Observatory—Mont Mégantic, Quebec |
| stellafane.org | p. 11 | Stellafane—Springfield, Vermont |
| www.astronomielaval.org | p. 11 | Laval Observatory—Laval, Québec |
| astrosurf.com/cdadfs/cafta.html | p. 12 | CAFTA—St-Timothée, Québec |
| rascmontreal.org/moon/ our-observatory |
p. 12 | Bellevue Observatory—Montréal, Québec |
| www.richmondhill.ca/en/david-dunlap-observatory.aspx | p. 12 | David Dunlap Observatory—Richmond Hill, Ontario |
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p. 12 | Green Bank Telescope—Green Bank, West Virginia |
| www.hamiltonrasc.ca/club-observatory/ | p. 12 | Hamilton Centre Observatory—Waterdown, Ontario |
| www.pitt.edu/~aobsvtry | p. 12 | Allegheny Observatory—Pittsburgh, Pennsylvania |
| rascto.ca/content/ ec-carr-astronomical-observatory-cao |
p. 12 | Carr Astronomical Observatory—Collingwood, Ontario |
| www.nyaa.ca/starfest.htm | p. 12 | Starfest—Mount Forest, Ontario |
| www.sno.phy.queensu.ca | p. 12 | Sudbury Neutrino Observatory—Creighton, Ontario |
| physics.uwo.ca/outreach/cronyn/index.html | p. 12 | Hume Cronyn Memorial Observatory—London, Ontario |
| www.scas.org/winter-star-party | p. 12 | Winter Star Party—Camp Wesumkee, Florida |
| www.gordonspark.com/astronomy | p. 12 | Manitoulin Star Party—Gordon's Park, Ontario |
| www.rascwindsor.com/pages/ hallam-observatory.php |
p. 12 | Hallam Observatory—Comber, Ontario |
| www.jeffgvu.com/pssp-1.html | p. 12 | Prairie Skies Star Party—Bourbonnais, Illinois |
| www.greatlakesstargaze.com | p. 12 | Great Lakes Star Gaze—Gladwin, Michigan |
| bootlegastronomy.com | p. 12 | Bootleg Star Party—Green River State Wildlife Area, Illinois |
| https://www.macalester.edu/physics/teachingresearch/ facilities/observatory |
p. 12 | Macalester Observatory—St. Paul, Minnesota |
| texasstarparty.org | p. 12 | Texas Star Party—Fort Davis, Texas |
| www.as.utexas.edu/mcdonald/mcdonald.html | p. 12 | McDonald Observatory—Fort Davis, Texas |
| regina.rasc.ca/node/9 | p. 12 | Kalium Observatory—Regina, Saskatchewan |
| www.apo.nmsu.edu | p. 12 | Apache Point Observatory—Sunspot, New Mexico |
| www.usask.ca/rasc/sleaford.html | p. 12 | Sleaford Observatory—Saskatoon, Saskatchewan |
| www.vla.nrao.edu | p. 12 | Very Large Array—Socorro, New Mexico |
| sssp.saskatoon.rasc.ca | p. 12 | Saskatchewan Summer Star Party—Cypress Hills Park, SK |
| skycenter.arizona.edu | p. 12 | Steward Observatory—Tucson, Arizona |
| www.sao.arizona.edu/FLWO/whipple.html | p. 13 | Fred Lawrence Whipple Observatory—Amado, Arizona |
| www.noao.edu/kpno | p. 13 | Kitt Peak National Observatory—Tucson, Arizona |
| www.lowell.edu | p. 13 | Lowell Observatory—Flagstaff, Arizona |
| calgary.rasc.ca/asp.htm | p. 13 | Alberta Star Party—Caroline, Alberta |
| calgary.rasc.ca/tourrequest.htm | p. 13 | Wilson Coulee Observatory—Okotoks, Alberta |
| www.rtmcastronomyexpo.org | p. 13 | Riverside Telescope Makers Conference—Camp Oakes, California |
| www.astro.caltech.edu/palomar | p. 13 | Palomar Observatory—San Diego, California |
| jasperdarksky.travel | p. 13 | Jasper Dark-Sky Festival,/em> Jasper Alberta |
| www.mtwilson.edu | p. 13 | Mt. Wilson Observatory—Pasadena, California |
| nrc.canada.ca/en/research-development/nrc-facilities/ dominion-radio-astrophysical-observatory-research-facility |
p. 13 | Dominion Radio Astrophysical Observatory—Penticton, B.C. |
| www.mksp.ca | p. 13 | Mount Kobau Star Party—Osoyoos, British Columbia |
| oregonstarparty.org | p. 13 | Oregon Star Party—Ochoco National Forest, Oregon |
| www.tmspa.com | p. 13 | Table Mountain Star Party—Eden Valley, Oroville, Washington |
| www.goldendaleobservatory.com | p. 13 | Goldendale Observatory—Goldendale, Washington |
| pmo-sun.uoregon.edu | p. 13 | Pine Mountain Observatory—Pine Mountain, Oregon |
| mthamilton.ucolick.org | p. 13 | Lick Observatory—San Jose, California |
| pgrasc.org/about/tours/ | p. 13 | Prince George Centre Observatory—Prince George, British Columbia |
| www.nrc-cnrc.gc.ca/eng/ solutions/facilities/dao.html |
p. 13 | Dominion Astrophysical Observatory—Victoria, British Columbia |
| yukonastronomy.com | p. 13 | Yukon Star Party—Takhini Hot Springs, Whitehorse, Yukon |
| www.eaobservatory.org/jcmt/ | p. 13 | James Clerk Maxwell Telescope—Mauna Kea, Hawaii |
| www.cfht.hawaii.edu | p. 13 | Canada-France-Hawaii Telescope—Mauna Kea, Hawaii |
| www.gemini.edu/pio/ | p. 13 | Gemini North—Mauna Kea, Hawaii |
| www.colorado.edu/fiske | p. 13 | Fiske Planetarium—Boulder, Colorado |
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p. 13 | TELUS Spark—Calgary, Alberta |
| www.adlerplanetarium.org | p. 13 | Adler Planetarium—Chicago, Illinois |
| www.starhop.com/plan-your-visit | p. 14 | McAuliffe-Shepard Discovery Center—Concord, New Hampshire |
| telusworldofscienceedmonton.ca | p. 14 | TELUS World of Science—Edmonton, Alberta |
| www.astronomynovascotia.ca | p. 14 | Halifax Planetarium—Halifax, Nova Scotia |
| www.physics.mcmaster.ca/planetarium | p. 14 | W.J. McCallion Planetarium—Hamilton, Ontario |
| www.hmns.org/planetarium/ | p. 14 | Burke Baker Planetarium—Houston |
| www.griffithobservatory.org/programs/ soplanetarium.html |
p. 14 | Samuel Oschin Planetarium—Los Angeles |
| www.astrolab-parc-national-mont-megantic.org | p. 14 | ASTROLab du Mont Mégantic—Mont Mégantic, Québec |
| espacepourlavie.ca/en/access/ rio-tinto-alcan-planetarium |
p. 14 | Planétarium de Montréal—Montréal, Québec |
| www.mysticseaport.org/explore/planetarium | p. 14 | Mystic Seaport Planetarium—Mystic |
| https://www.amnh.org/research/hayden-planetarium | p. 14 | Hayden Planetarium—New York |
| www.omsi.edu/planetarium | p. 14 | Harry C. Kendall Planetarium—Portland |
| www.slsc.org | p. 14 | ames S. McDonnell Planetarium—St. Louis |
| https://laurentian.ca/planetarium | p. 14 | Doran Planetarium—Sudbury |
| http://www.ontariosciencecentre.ca/ exhibitsandshows |
p. 14 | Ontario Science Centre—Toronto |
| https://www.spacecentre.ca | p. 14 | MacMillan Planetarium—Vancouver |
| www.si.edu/theaters/planetarium | p. 14 | Albert Einstein Planetarium—Washington, D.C. |
| www.northernlightscentre.ca | p. 14 | Northern Lights—Watson Lake, Yukon
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| www.sfsciencecenter.org/planetarium-shows | p. 14 | Aldrin Planetarium—West Palm Beach |
| manitobamuseum.ca/main/visit/planetarium | p. 14 | Manitoba Planetarium—Winnipeg |
| www.discovertheuniverse.ca | p. 16 | Discover the Universe |
| www.decouvertedelunivers.ca | p. 18 | Decouverte de l'univers |
| www.rasc.ca/skyways-explorons-lastronomie | p. 18 | Skyways, Astronomy Handbook for Teachers |
| skynews.ca | p. 18 | RASC's SkyNews magazine |
| www.asc-csa.gc.ca/eng/resources-young | p. 18 | Canadian Space Agency |
| astro-canada.ca | p. 18 | Canada Under the Stars – Exhibit from the Virtual Museum of Canada |
| www.aavso.org/greek-letters | p. 19 | Greek letters spelling variations |
| ssd.jpl.nasa.gov | p. 22 | Minor planet orbital and physical elements |
| ssd.jpl.nasa.gov/?satellites | p. 24 | Satellite orbital and physical elements |
| planetarynames.wr.usgs.gov/Page/Planets | p. 25 | Names of the satellites |
| https://skyandtelescope.org/observing/ the-martian-moons-in-200708 |
p. 25 | Martian moons locator |
| einstein.stanford.edu | p. 28 | CODATA physical constants |
| physics.nist.gov/cuu/Constants | p. 29 | CODATA physical constants |
| www.7timer.info | p. 38 | Weather and satellite finder |
| heavens-above.com | p. 38 | Heavens Above satellite finder |
| hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat | p. 44 | Leap second announcements |
| maia.usno.navy.mil | p. 44 | Radio time signals |
| www.webexhibits.org/daylightsaving | p. 45 | Daylight Saving Time information |
| www.nrc-cnrc.gc.ca/eng/services/inms/time-services.html | p. 45 | Canadian time zones |
| www.time.gov | p. 45 | U.S. time zones |
| www.nist.gov/pml/time-and-frequency-division/ services/internet-time-service-its |
p. 47 | Internet time service |
| time5.nrc.ca | p. 47 | Internet time service |
| en.wikipedia.org/wiki/Julian_day#Julian_Date | p. 47 | Julian Date |
| clarkvision.com/visastro | p. 57 | Visual Astronomy |
| www.bbastrodesigns.com/visual.html | p. 57 | Visual Astronomy |
| skyandtelescope.org/tag/visual-observing | p. 59 | Spectacles for astro-viewing |
| www.optego.com | p. 59 | ight Myopia Diagnostic Flippers |
| www.rasc.ca/lpa/sky-quality-measurement-project | p. 68 | Sky Quality Measurement Project |
| www.bogan.ca/astro/optics/maglimit.html | p. 68 | LTM - LVM relationship |
| www.backyardastronomy.com/Backyard_Astronomy/ Downloads_files/Appendix%20C-Polar.pdf |
p. 71 | Polar alignment |
| eclipsophile.com | p. 73 | Weather forecasts and maps |
| weather.unisys.com/satellite/infrared.php | p. 74 | Infrared satellite images |
| weather.gc.ca/radar | p. 75 | RADAR loops |
| www.wunderground.com/intellicast | p. 75 | Interactive weather maps |
| www.weatheroffice.ec.gc.ca/astro/ clds_vis_e.html | p. 75 | Cloud forecast |
| ozoneaq.gsfc.nasa.gov | p. 76 | Aerosol envelope forecasts |
| www.nrlmry.navy.mil/aerosol/ #currentaerosolmodeling |
p. 76 | Aerosol envelope forecasts |
| weather.gc.ca/astro/ transparence_e.html |
p. 76 | Transparency forecasts |
| weather.gc.ca/astro/seeing_e.html | p. 77 | Seeing forecast |
| www.weatherweb.net/wxwebastronomy.php | p. 78 | UK forecast |
| www.philhart.com/content/cloud-forecasts-astronomers | p. 78 | Australian forecast |
| http://www.accuweather.com | p. 78 | USA forecasts |
| www.rasc.ca/lpa | p. 84 | RASC Light-Pollution Abatement Committee |
| www.rasc.ca/dark-sky-site-guidelines | p. 84 | DSP and USP lighting guidelines |
| www.rasc.ca/technology | p. 84 | Technical aspects of light pollution |
| www.csbg.ca/BLOG.HTM | p. 84 | Technical information |
| rasc.ca/lpa-special-issue | p. 84 | RASC Light-Pollution Abatement Special Issue |
| www.rasc.ca/sites/default/files/obsform.pdf | p. 86 | Sample observing form |
| www.rasc.ca/astrosketchers-group | p. 88 | RASC Astrosketchers Group |
| www.perezmedia.net/beltofvenus | p. 90 | Sketching techniques |
| www.rasc.ca/lakomiak-lunar | p. 90 | Carol Lakomiak’s lunar tutorial |
| www.rasc.ca/lakomiak-sundso | p. 90 | Carol Lakomiak’s solar tutorial |
| www.asod.info | p. 90 | Astronomy Sketch of the Day (ASOD) |
| www.cloudynights.com | p. 90 | Cloudy Nights Sketching Forums |
| https://www.amazingsky.com/NightscapesBook | p. 93 | Alan Dyer's How To |
| www.cloudynights.com | p. 93 | Cloudy Nights online imaging forums |
| www.astronomie.be/registax | p. 93 | RegiStax image-stacking and processing freeware |
| deepskystacker.free.fr | p. 93 | DeepSkyStacker image-stacking and registration freeware |
| www.astropix.com | p. 93 | Catching the Light, astrophotography page |
| www.lex.sk.ca/astro/ | p. 93 | Tenho Tuomi’s Observatory |
| ssd.jpl.nasa.gov/?horizons | p. 95 | JPL Horizons ephemerides |
| www.EclipseWise.com | p. 123 | Solar eclipse figures |
| eclipsewise.com/solar/solar.html | p. 123 | Eclipse figure atlas |
| www.EclipseWise.com/eclipse.html#yr2020 | p. 126 | Solar eclipse details for 2020 |
| www.EclipseWise.com/solar/SEcirc/2001-2100/ SE2020Jun21Acirc.html |
p. 130 | 2020 Jun. 21 Solar Eclipse Calculator |
| www.eclipsewise.com/solar/SEsaros/ SEsaros137.html |
p. 130 | Saros 137 details |
| www.EclipseWise.com/solar/SEcirc/2001-2100/ SE2020Dec14Tcirc.html |
p. 134 | 2020 Dec. 14 Solar Eclipse circular |
| www.eclipsewise.com/solar/SEsaros/ SEsaros142.html |
p. 135 | Saros 142 details |
| www.eclipsewise.com/solar/JSEX/JSEX-index.html | p. 142 | Javascript Solar Eclipse Explorer |
| eclipse.gsfc.nasa.gov/JLEX/JLEX-index.html | p. 142 | Javascript Lunar Eclipse Explorer |
| www.eclipsewise.com/oh/ec2021.html | p. 142 | Details on 2021 eclipses |
| www.mreclipse.com/MrEclipse.html | p. 142 | Eclipse photography and observing tips |
| wms.lroc.asu.edu/LROC | p. 149 | Lunar Reconnaissance Orbiter mosaic |
| aa.usno.navy.mil/data/docs/RS_OneYear.php | p. 151 | USNO online rise/set calculator |
| rasc.ca/isabel-williamson-lunar-observing-program | p. 161 | Lunar-observing certificate program |
| www.rasc.ca/observing/explore-the-moon-observing-certificate | p. 161 | Explore the Moon Certificate program |
| www.occultations.org | p. 162 | International Occultation Timing Association |
| occultations.org/observing/occultation-predictions/ | p. 162 | Link to Occult4 software |
| www.lunar-occultations.com/iota/iotandx.htm | p. 163 | occultation information |
| www.rasnz.org.nz | p. 163 | Royal Astronomical Society of New Zealand |
| nrcan.gc.ca/maps-tools-publications/maps /topographic-maps/canada-maps/regional-distribution-centres/9783d |
p. 163 | Canadian topographical maps |
| nationalmap.gov/ustopo/ | p. 163 | USGS maps |
| www.tides.gc.ca/eng/data/predictions/2020 | p. 183 | Canadian tide tables for 2020 |
| tbone.biol.sc.edu/tide/tideshow.cgi | p. 183 | Worldwide tide tables |
| en.wikipedia.org/wiki/Solar_cycle_25 | p. 188 | Solar Cycle 25 |
| www.aavso.org/solar | p. 188 | AAVSO solar programs |
| sdo.gsfc.nasa.gov | p. 188 | Solar Dynamics Observatory site |
| parkersolarprobe.jhuapl.edu | p. 188 | Parker Solar Probe site |
| www.alpo-astronomy.org/solarblog | p. 188 | ALPO solar astronomy site |
| alpineastro.com/collections/ solar-observation |
p. 188 | Alpine Astronomical Solar Observation site |
| www.atoptics.co.uk/tiltsun.htm | p. 188 | Solar-tilt software site |
| www.oneminuteastronomer.com/999/choose-solar-filter | p. 188 | Choosing a solar filter |
| www.petermeadows.com/html/stonyhurst.html | p. 188 | Stonyhurst disks |
| https://britastro.org | p. 188 | BAA solar site |
| sohowww.nascom.nasa.gov | p. 188 | Solar and Heliospheric Observatory |
| www.swpc.noaa.gov | p. 188 | Space Weather Prediction Center |
| radiojove.gsfc.nasa.gov | p. 188 | Solar and Planetary Astronomy for Schools |
| www.solarham.net | p. 188 | Solar page for Ham Radio VE3EN |
| www.spaceweatherwoman.com | p. 188 | Dr. Tamitha Skov—Heliosphere Physicist |
| halpha.nso.edu | p. 188 | H Alpha Network Monitor |
| www.atoptics.co.uk/rainbows/ord34.htm | p. 197 | Higher-ordered rainbows |
| www.meteoros.de/haloe.htm | p. 204 | All about halos |
| www.philiplaven.com/index1.html | p. 204 | Water-drop optics |
| skyandtelescope.org/astronomy-resources/ caring-for-your-optics |
p. 212 | Cleaning optics S&T article |
| http://www.astromax.org/activities/2003/ mars2003/sketching.htm |
p. 213 | Sketching Mars |
| skyandtelescope.org/observing/ transit-times-of-jupiters-great-red-spot |
p. 225 | Great Red Spot transit calculator |
| https://skyandtelescope.org/astronomy-news/secret-documents- rewrite-the-discovery-of-neptune/ |
p. 229 | Discovery of Neptune article |
| www.stellarium.org | p. 237 | Saturn's satellites (MacOS, Linux, and Windows) |
| www.minorplanetcenter.net/iau/MPEph/MPEph.html | p. 244 | Asteroid orbital elements |
| www.poyntsource.com/New/RASC_Events.htm | p. 248 | Interactive maps, star lists |
| www.poyntsource.com/New/Global.htm | p. 248 | Interactive maps, star lists |
| www.hristopavlov.net/OccultWatcher/publish.htm | p. 248 | Asteroidal occultation finder |
| www.occultationpages.com/rasc/20200910_Mars.html | p. 249 | Mars 2020 occultation |
| www.asteroidoccultation.com | p. 249 | Asteroid occultation information |
| www.ta3.sk/IAUC22DB/MDC2007/Dokumenty /shower_nomenclature.php |
p. 252 | Meteor shower naming conventions |
| www.amsmeteors.org/fireball/report | p. 256 | Fireball observations for North America |
| IMO Fireball Reports | p. 256 | Fireball reports (global) |
| https://www.lpi.usra.edu/meteor/ | p. 257 | Meteoritical Bulletin database |
| curator.jsc.nasa.gov/antmet/lmc/index.cfm | p. 258 | Lunar meteorites |
| sites.wustl.edu/meteoritesite/items/lunar-meteorites | p. 258 | Lunar meteorites |
| curator.jsc.nasa.gov/antmet/mmc/index.cfm | p. 258 | Martian meteorites |
| www.imca.cc/mars/martian-meteorites.htm | p. 258 | Martian meteorites |
| meteoritical.org/about-meteorites/meteorite-names | p. 259 | Meteorite naming guidelines |
| www.passc.net/EarthImpactDatabase | p. 260 | Meteorite crater database |
| minorplanetcenter.net/iau/Ephemerides/Comets | p. 264 | Comet ephemerides |
| www.icq.eps.harvard.edu/CometMags.html | p. 264 | Comet magnitudes |
| www.minorplanetcenter.net/iau/MPEph/MPEph.html | p. 264 | Comet orbital elements |
| www.minorplanetcenter.net/iau/lists/CometResolution.html | p. 267 | Comet designation convention |
| www.cbat.eps.harvard.edu/cometnameg | p. 267 | Comet naming convention |
| pendientedemigracion.ucm.es/info/ Astrof/invest/actividad/spectra.html |
p. 284 | Spectra classification |
| ned.ipac.caltech.edu/level5/Gray/frames.html | p. 284 | Richard Gray’s Digital Spectral Classification Atlas |
| www.appstate.edu/~grayro/MK/winmk.htm | p. 284 | Digital Spectral Comparisons (Windows) |
| www.appstate.edu/~grayro/spectrum/ftp/download.html | p. 284 | Digital Spectral Comparisons (Linux) |
| www.rspec-astro.com/star-analyser/ | p. 284 | Star Analyser |
| go.uis.edu/gratingspectra | p. 284 | Slitless spectroscopy |
| www.rspec-astro.com/sample-projects/ | p. 284 | Spectroscopy examples |
| www.astrosurf.com/buil/index.html | p. 284 | Spectroscopy examples |
| www.menkescientific.com/johnspage.html | p. 284 | Spectroscopy examples |
| go.uis.edu/gratingspectra | p. 284 | Processing spectra |
| www.aavso.org/observing-campaigns#current | p. 284 | AAVSO Observing Campaigns |
| www.recons.org/ | p. 287 | RECONS database |
| www.jdso.org | p. 291 | Electronic journal for double-star observing |
| tdc-www.harvard.edu/catalogs/sao.html | p. 296 | SAO Star Catalog |
| www.aavso.org/vsx | p. 299 | Eclipsing binaries database |
| rr-lyr.irap.omp.eu/dbrr/index.php | p. 299 | RR Lyr Database |
| www.aavso.org/WebObs | p. 303 | Reporting form for observations |
| earthsky.org/space/star-trek-planet-vulcan-40-eridani-a/ | p. 304 | Spock's Star |
| clarkvision.com/ | p. 309 | Star size and surface brightness |
| www.univie.ac.at/webda/navigation.html | p. 311 | Open Clusters lists |
| physwww.mcmaster.ca/~harris/WEHarris.html | p. 312 | Globular cluster data |
| www.robgendlerastropics.com/M14-BYUL.html | p. 313 | M14 image |
| www.rasc.ca/handbook/supplements | p. 321 | Dark nebulae information |
| nedwww.ipac.caltech.edu/level5 | p. 334 | NED compilation |
| www.radio-astronomy.org | p. 338 | Society of Amateur Radio Astronomers |
| www.ukaranet.org.uk | p. 338 | UK Amateur Radio Astronomy Network |
Web Resources for the USA Edition
Listing of Web Resources, where they differ, for the 2020 USA Edition of the Observer's Handbook
| www.acadianightskyfestival.org | p. 11 | Acadia Night Sky Festival—Bar Harbor, Maine |
| www.fi.edu/exhibit/observatory | p. 11 | Franklin Institute Bloom Observatory—Philadelphia, Pennsylvania |
| www.astrohbg.org/public-observing | p. 12 | Harrisburg Star Party—Harrisburg, Pennsylvania |
| Cherry Springs website | p. 12 | Cherry Springs Star Party—Cherry Springs S.P., Coudersport, PA |
| www.chaosastro.org/starparty | p. 12 | Staunton River Star Party—Halifax County, Virginia |
| www.ahsp.org | p. 12 | Almost Heaven Star Party—Spruce Knob, West Virginia |
| www.greenbankstarquest.org | p. 12 | Green Bank Star Quest—Green Bank, West Virginia |
| www.mvas.org/node/5372 | p. 12 | Apollo Rendezvous—John Bryan State Park, Ohio |
| www.greatlakesstargaze.com | p. 12 | Great Lakes Star Gaze—Gladwin, Michigan |
| rainwaterobservatory.org | p. 12 | Midsouth Star Gaze—French Camp, Mississippi |
| sas-sky.org | p. 12 | Illinois Dark Sky Star Party—Jim Edgar Panther Creek FWA |
| askc.org/events/hoasp | p. 12 | Heart of America Star Party—Butler, Missouri |
| www.nebraskastarparty.org | p. 12 | Nebraska Star Party—Valentine, Nebraska |
| www.okie-tex.com | p. 12 | Okie-Tex Star Party—Camp Billy Joe, Oklahoma |
| rmss.org | p. 12 | Rocky Mountain Star Stare—Gardner, Colorado |
| www.enchantedskies.org/essp/index.html | p. 12 | Enchanted Skies Star Party—Magdalena, New Mexico |
| www.ifastro.org | p. 12 | Craters of the Moon Star Party—Craters of the Moon, New Mexico |
| www.bigskyastroclub.org | p. 13 | Logan Pass Star Party—West Glacier, Montana |
| www.boiseastro.org/isp.html | p. 13 | Idaho Star Party—Bruneau Dunes State Park, Idaho |
| www.nps.gov/deva/planyourvisit/death-valley-dark-sky-festival.htm | p. 13 | Death Valley Star Party—Death Valley, California |
| goldenstatestarparty.org | p. 13 | Golden State Star Party—Bieber, California |
| www.dmns.org | p. 14 | Denver Museum of Nature and Science—Denver |
| www.frostscience.org | p. 14 | Frost Museum of Science—Miami |
| slco.org/clark-planetarium | p. 14 | Clark Planetarium—Salt Lake City |
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Tuesday, May 3, 2011 - 6:59am
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Monday, September 21, 2020 - 10:59am
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