Web Links

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 2021 Observer’s Handbook.
  • Access all the websites listed in the 2021 Observer’s Handbook, listed by page.
    • Access the websites listed in in the body of the 2021  USA Edition Observer’s Handbook where they differ from the Standard Edition.

Selected Internet Resources

From Page 15 of the 2021 Observer's Handbook

aavso.org American Association of Variable Star Observers (p. 298)
alpo-astronomy.org Association of Lunar and Planetary Observers (p. 221)
fireball.amsmeteors.org/members/imo/report_intro/ American Meteor Society (p. 256)
asc-csa.gc.ca Canadian Space Agency
astronomerswithoutborders.org Astronomers Without Borders
astronomy.com Astronomy Magazine (p. 10)
astrosociety.org Astronomical Society of the Pacific (p. 18)
cbat.eps.harvard.edu/index.html International Astronomical Union Central Bureau (p. 7); see also iau.org
cleardarksky.com/csk Clear Sky Chart, by Attilla Danko (p. 78)
darksky.org International Dark-Sky Association (p. 82)
heavens-above.com Satellite tracking information, including International Space Station
hubblesite.org Hubble Heritage Site, access to HST images
imo.net International Meteor Organization (p. 254)
jpl.nasa.gov Jet Propulsion Laboratory, activities for adults and kids
MrEclipse.com Eclipse photography and safety (p. 143)
ned.ipac.caltech.edu NASA/IPAC Extragalactic Database (p. 334)
occultations.org International Occultation Timing Association (p. 162)
planetary.org Planetary Society—contains over 2000 pages of information about space exploration
rasc.ca The Royal Astronomical Society of Canada (p. 7)
rasc.ca/handbook Observer's Handbook website (inside front cover
saguaroastro.org Saguaro Astronomy Club, includes observing list database (p. 87)
seds.org Students for the Exploration and Development of Space
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)
spaceflight.nasa.gov NASA space flight site giving current information on ISS activities and human space flight
stsci.edu Space Telescope Science Institute; access to Digitized Sky Survey
syfy.com/tags/bad-astronomy Phil Plait's "Bad Astronomy" site
ui.adsabs.harvard.edu NASA Astrophysics Data System (ADS); bibliographic database, access to millions of articles
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 2021 Observer’s Handbook

wis-tns.weizmann.ac.il//user/register p. 7 Transient Name Server
minorplanetcenter.net/iau/info/TechInfo.html p. 7 Minor Planet Reports
fireflybooks.com p. 10 Firefly Books
iopscience.iop.org p. 10 Publications of the Astronomical Society of the Pacific
apple.com/itunes p. 10 Apple iTunes
appworld.blackberry.com/webstore p. 10 Blackberry Apps World
microsoft.com/en-ca/store/apps/windows 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
darkskyproject.co.nz p. 11 Dark Sky Project—Lake Tekapo, New Zealand
aao.gov.au p. 11 Australian Astronomical Observatory—Siding Spring, Australia
rsaa.anu.edu.au/observatories/mount-stromlo-observatory p. 11 Mount Stromlo Observatory—Canberra, Australia
perthobservatory.com.au p. 11 Perth Observatory—Bickley, Australia
sarao.ac.za p. 11 MeerKAT Observatory—Carnarvon, South Africa
mpifr-bonn.mpg.de/effelsberg p. 11 Effelsberg Radio Telescope—Effelsberg, Germany

rmg.co.uk/royal-observatory

p. 11 Greenwich Observatory—Greenwich, England
jodrellbank.manchester.ac.uk p. 11 Lovell Radio Telescope—Jodrell Bank, England
armagh.space p. 11 Armagh Observatory—Armagh, Northern Ireland
birrcastle.com/telescope-astronomy p. 11 “Leviathan” Great Telescope—Birr, Ireland
ing.iac.es 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
ap.smu.ca/pr/bgo p. 11 Burke-Gaffney Observatory—Halifax, Nova Scotia
halifax.rasc.ca/index.php/activities/
43-nova-east-star-party
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
deepskyeye.com p. 11 Deep Sky Eye Observatory—Quinan, Nova Scotia
eso.org/public/teles-instr/paranal-observatory p. 11 Paranal Observatory (ESO)—Cerro Paranal, Chile
lco.cl p. 11 Las Campanas Observatory—Cerro Las Campanas, Chile
gemini.edu p. 11 Gemini South Observatory—Cerro Pachon, Chile
eso.org/sci/facilities/lasilla.html p. 11 La Silla Observatory—Cerro La Silla, Chile
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.com p. 11 Stellafane—Springfield, Vermont
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
richmondhill.ca/en/david-dunlap-observatory.aspx p. 12 David Dunlap Observatory—Richmond Hill, Ontario

greenbankobservatory.org

p. 12 Green Bank Telescope—Green Bank, West Virginia
hamiltonrasc.ca/club-observatory/ p. 12 Hamilton Centre Observatory—Waterdown, Ontario
pitt.edu/~aobsvtry p. 12 Allegheny Observatory—Pittsburgh, Pennsylvania
rascto.ca/content/
ec-carr-astronomical-observatory-cao
p. 12 Carr Astronomical Observatory—Collingwood, Ontario
nyaa.ca/starfest.htm p. 12 Starfest—Mount Forest, Ontario
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
scas.org/winter-star-party p. 12 Winter Star Party—Camp Wesumkee, Florida
gordonspark.com/astronomy p. 12 Manitoulin Star Party—Gordon's Park, Ontario
rascwindsor.com/pages/
hallam-observatory.php
p. 12 Hallam Observatory—Comber, Ontario
greatlakesstargaze.com p. 12 Great Lakes Star Gaze—Gladwin, Michigan
bootlegastronomy.com p. 12 Bootleg Star Party—Green River State Wildlife Area, Illinois
macalester.edu/physics/teachingresearch/
facilities/observatory
p. 12 Macalester Observatory—St. Paul, Minnesota
texasstarparty.org p. 12 Texas Star Party—Fort Davis, Texas
as.utexas.edu/mcdonald/mcdonald.html p. 12 McDonald Observatory—Fort Davis, Texas
regina.rasc.ca/ observatory-tours p. 12 Kalium Observatory—Regina, Saskatchewan
apo.nmsu.edu p. 12 Apache Point Observatory—Sunspot, New Mexico
usask.ca/rasc/sleaford.html p. 12 Sleaford Observatory—Saskatoon, Saskatchewan
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
sao.arizona.edu/FLWO/whipple.html p. 13 Fred Lawrence Whipple Observatory—Amado, Arizona
noao.edu/kpno p. 13 Kitt Peak National Observatory—Tucson, Arizona
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
astro.caltech.edu/palomar p. 13 Palomar Observatory—San Diego, California
jasperdarksky.travel p. 13 Jasper Dark-Sky Festival,/em> Jasper Alberta
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.
mksp.ca p. 13 Mount Kobau Star Party—Osoyoos, British Columbia
oregonstarparty.org p. 13 Oregon Star Party—Ochoco National Forest, Oregon
parks.state.wa.us/512/Goldendale-Observatory 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 p. 13 Prince George Centre Observatory—Prince George, British Columbia
nrc.canada.ca/en/research-development/nrc-facilities/
dominion-astrophysical-observatory-research-facility
p. 13 Dominion Astrophysical Observatory—Victoria, British Columbia
starfinders.ca/island-star-party p. 13 Cowichan Valley Star Party—Bright Angel Regional Park, B.C.
yukonastronomy.com p. 13 Yukon Star Party—Takhini Hot Springs, Whitehorse, Yukon
eaobservatory.org/jcmt/ p. 13 James Clerk Maxwell Telescope—Mauna Kea, Hawaii
cfht.hawaii.edu p. 13 Canada-France-Hawaii Telescope—Mauna Kea, Hawaii
gemini.edu/pio/ p. 13 Gemini North—Mauna Kea, Hawaii
colorado.edu/fiske p. 13 Fiske Planetarium—Boulder, Colorado

sparkscience.ca

p. 13 TELUS Spark—Calgary, Alberta
adlerplanetarium.org p. 13 Adler Planetarium—Chicago, Illinois
starhop.com p. 14 McAuliffe-Shepard Discovery Center—Concord, New Hampshire
telusworldofscienceedmonton.ca p. 14 TELUS World of Science—Edmonton, Alberta
astronomynovascotia.ca/index.php/planetarium p. 14 Halifax Planetarium—Halifax, Nova Scotia
physics.mcmaster.ca/planetarium p. 14 W.J. McCallion Planetarium—Hamilton, Ontario
hmns.org/planetarium p. 14 Burke Baker Planetarium—Houston
griffithobservatory.org/programs/
soplanetarium.html
p. 14 Samuel Oschin Planetarium—Los Angeles
astrolab.qc.ca p. 14 ASTROLab du Mont Mégantic—Mont Mégantic, Québec
espacepourlavie.ca/en/access/
rio-tinto-alcan-planetarium
p. 14 Planétarium de Montréal—Montréal, Québec
mysticseaport.org/explore/planetarium p. 14 Treworgy Planetarium—Mystic
amnh.org/our-research/hayden-planetarium p. 14 Hayden Planetarium—New York
omsi.edu/planetarium p. 14 Harry C. Kendall Planetarium—Portland
slsc.org p. 14 James S. McDonnell Planetarium—St. Louis
laurentian.ca/planetarium p. 14 Doran Planetarium—Sudbury
ontariosciencecentre.ca/exhibitsandshows p. 14 Ontario Science Centre—Toronto
spacecentre.ca p. 14 MacMillan Planetarium—Vancouver
si.edu/theaters/planetarium p. 14 Albert Einstein Planetarium—Washington, D.C.
northernlightscentre.ca p. 14 Northern Lights—Watson Lake, Yukon

 

sfsciencecenter.org/planetarium-shows p. 14 Aldrin Planetarium—West Palm Beach
manitobamuseum.ca/main/visit/planetarium p. 14 Manitoba Planetarium—Winnipeg
discovertheuniverse.ca p. 16 Discover the Universe
nightsky.jpl.nasa.gov/
download-view.cfm?Doc_ID=327
p. 17 Yardstick Eclipse Demonstration
decouvertedelunivers.ca p. 18 Decouverte de l'univers
rasc.ca/classroom-help p. 18 RASC Teacher Resources
rasc.ca/skyways-explorons-lastronomie p. 18 Skyways, Astronomy Handbook for Teachers
astroedu.iau.org p. 18 AstroEDU – Educational site from the IAU
asc-csa.gc.ca/eng/resources-young p. 18 Canadian Space Agency—Resources for the Young
astro-canada.ca p. 18 Canada Under the Stars – Exhibit from the Virtual Museum of Canada
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
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
7timer.info p. 38 Weather and satellite finder
hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat p. 44 Leap second announcements
webexhibits.org/daylightsaving p. 45 Daylight Saving Time information
nrc-cnrc.gc.ca/eng/services/inms/time-services.html p. 45 Canadian time zones
time.gov p. 45 U.S. time zones
nist.gov/pml/time-and-frequency-division/
time-distribution/internet-time-service-its
p. 47 Internet time service
en.wikipedia.org/wiki/Julian_day#Julian_Date p. 47 Julian Date
clarkvision.com/visastro p. 57 Visual Astronomy
bbastrodesigns.com/visual.html p. 57 Visual Astronomy
skyandtelescope.org/astronomy-resources/
spectacles-for-spectacular-skies
p. 59 Spectacles for Spectacular Skies
rasc.ca/lpa/sky-quality-measurement-project p. 68 Sky Quality Measurement Project
bogan.ca/astro/optics/maglimit.html p. 68 LTM – LVM relationship
backyardastronomy.com/Backyard_Astronomy
/Downloads.html
p. 71 Polar alignment
eclipsophile.com p. 73 Weather forecasts and maps
wunderground.com/maps/satellite/infrared p. 74 Infrared satellite images
weather.gc.ca/radar p. 75 RADAR loops
wunderground.com/radar p. 75 Interactive weather maps
weatheroffice.ec.gc.ca/astro/ clds_vis_e.html p. 75 Cloud forecast
ozoneaq.gsfc.nasa.gov p. 76 Aerosol envelope forecasts
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
weatherweb.net/wxwebastronomy.php p. 78 UK forecast
philhart.com/content/cloud-forecasts-astronomers p. 78 Australian forecast
www.accuweather.com p. 78 USA forecasts
rasc.ca/lpa p. 84 RASC Light-Pollution Abatement Committee
csbg.ca/BLOG.HTM p. 84 Technical information
rasc.ca/dark-sky-site-guidelines p. 84 CGOL – Canadian guidelines for Outdoor Lighting
rasc.ca/lpa-special-issue p. 84 RASC Light-Pollution Abatement Special Issue
rasc.ca/sites/default/files/obsform.pdf p. 86 Sample observing form
rasc.ca/astrosketchers-group p. 88 RASC Astrosketchers Group
perezmedia.net/beltofvenus p. 90 Sketching techniques
rasc.ca/lakomiak-lunar p. 90 Carol Lakomiak’s lunar tutorial
rasc.ca/lakomiak-sundso p. 90 Carol Lakomiak’s solar tutorial
asod.info p. 90 Astronomy Sketch of the Day (ASOD)
www.cloudynights.com p. 90 Cloudy Nights Sketching Forums
www.irfanview.com p. 93 IrFanView
gimp.org p. 93 GIMP
adobe.com p. 93 Adobe Photoshop
diffractionlimited.com/product/maxim-dl p. 93 MaxIm DL
amazingsky.smugmug.com/NightscapesBook p. 93 Alan Dyer'sHow To Photograph and Process Nightscapes and Timelapses
www.cloudynights.com p. 93 Cloudy Nights online imaging forums
astronomie.be/registax p. 93 RegiStax image-stacking and processing freeware
deepskystacker.free.fr p. 93 DeepSkyStacker image-stacking and registration freeware
astropix.com p. 93 Catching the Light, astrophotography page
lex.sk.ca/astro/index.htm p. 93 Tenho Tuomi’s Observatory
ssd.jpl.nasa.gov/?horizons p. 95 JPL Horizons ephemerides
EclipseWise.com p. 123 Solar eclipse figures
eclipsewise.com/solar/solar.html p. 123 Solar Eclipse figure atlas
www.EclipseWise.com/lunar/LEsaros/LEsaros121.html p. 127 Saros 121 details
www.EclipseWise.com/lunar/LEprime/
2001-2100/LE2021May26Tprime.html
p. 127 2021 May 26 Lunar eclipse
eclipsewise.com/solar/SEsaros/
SEsaros147.html
p. 132 Saros 147 details
www.eclipsewise.com/solar/SEprime
2001-2100/SE2021Jun10Aprime.html
p. 131 2021 Jun. 10 Solar Eclipse circular
www.EclipseWise.com/lunar/
LEsaros/LEsaros126.html
p. 136 Saros 126 details
eclipsewise.com/lunar/LEprime/2001-2100
/LE2021Nov19Pprime.html
p. 136 2021 Nov. 19 Lunar Eclipse circular
www.EclipseWise.com/solar/
SEsaros/SEsaros152.html
p. 137 Saros 152 details
www.EclipseWise.com/solar/SEprime/2001-2100/
SE2021Dec04Tprime.html
p. 137 2021 Dec. 04 Solar Eclipse circular
www.EclipseWise.com/solar/JSEX/JSEX-index.html p. 142 Javascript Solar Eclipse Explorer
www.EclipseWise.com/lunar/JLEX/JLEX-index.html p. 142 Javascript Lunar Eclipse Explorer
eclipsewise.com/eclipse.html#preview p. 142 Details on 2021 eclipses
eclipse.gsfc.nasa.gov/eclipse.html p. 143 Pre-2015 archival reference resource
MrEclipse.com/MrEclipse.html p. 143 Eclipse photography and observing tips
wms.lroc.asu.edu/LROC p. 149 Lunar Reconnaissance Orbiter mosaic
rasc/supplements p. 150 Blank chart for Moonrise/Moonset Correction
rasc.ca/isabel-williamson-lunar-observing-program p. 161 Lunar-observing certificate program
rasc.ca/observing/explore-the-moon-observing-certificate p. 161 Explore the Moon Certificate program
rasc.ca/sites/default/files/
IMG_3942.PNG
p. 161 Lunar features named for women
poyntsource.com/IOTAmanual/Preview.htm p. 162 IOTA Manual
occultations.org p. 162 International Occultation Timing Association
lunar-occultations.com/iota/iotapredictions.pdf p. 162 Link to Occult4 software
lunar-occultations.com/iota p. 163 occultation information
occultations.org/community/international-iota-sections p. 163 International IOTA Sections
maps.nrcan.gc.ca/distrib_centres_e.php p. 163 Canadian topographical maps
nationalmap.gov/ustopo/ p. 163 USGS maps
occultations.org/observing/reporting-observations p. 163 Reporting procedures
tides.gc.ca/eng/data/predictions/2021 p. 183 Canadian tide tables for 2020
tbone.biol.sc.edu/tide/index.html p. 183 Worldwide tide tables
en.wikipedia.org/wiki/Solar_cycle_25 p. 188 Solar Cycle 25
aavso.org/solar p. 188 AAVSO solar programs
almanac.com/content/
solar-cycle-updates-and-predictions
p. 188 Solar Cycle updates and predictions
alpineastro.com/collections/
solar-observation
p. 188 Alpine Astronomical Solar Observation site
alpo-astronomy.org/solarblog p. 188 ALPO solar astronomy site
atoptics.co.uk/tiltsun.htm p. 188 Solar-tilt software site
britastro.org p. 188 BAA solar site
halpha.nso.edu p. 188 H Alpha Network Monitor
nasa.gov/content/goddard/parker-solar-probe p. 188 Parker Solar Probe
oneminuteastronomer.com/999/choose-solar-filter p. 188 Choosing a solar filter
petermeadows.com/html/stonyhurst.html p. 188 Stonyhurst disks
radiojove.gsfc.nasa.gov p. 188 Solar and Planetary Astronomy for Schools
sdo.gsfc.nasa.gov p. 188 Solar Dynamics Observatory site
sohowww.nascom.nasa.gov p. 188 Solar and Heliospheric Observatory
solarham.net p. 188 Solar page for Ham Radio VE3EN
spaceweatherwoman.com p. 188 Dr. Tamitha Skov—Heliosphere Physicist
stce.be p. 188 Solar-Terrestrial Centre of Excellence—Belgium
swpc.noaa.gov p. 188 Space Weather Prediction Center
atoptics.co.uk/rainbows/ord34.htm p. 197 Higher-ordered rainbows
meteoros.de/haloe.htm p. 204 All about halos
philiplaven.com/index1.html p. 204 Water-drop optics
skyandtelescope.org/astronomy-resources/
caring-for-your-optics
p. 212 Cleaning optics S&T article
wikihow.com/Observe-Mars p. 213 Sketching Mars
nsdb.imcce.fr/multisat/nsszph517he.htm p. 223 Galilean moon events
www.imcce.fr/recherche/campagnes-observations/
phemus/phemu
p. 223 Observation campaign
jupos.privat.t-online.de p. 225 Great Red Spot transit calculator
skyandtelescope.com/observing/
objects/planets/3304091.html
p. 225 Great Red Spot transit calculator
skyandtelescope.org/astronomy-news/secret-documents-
rewrite-the-discovery-of-neptune/
p. 229 Discovery of Neptune article
stellarium.org p. 237 Saturn's satellites (MacOS, Linux, and Windows)
iau.org/public/pluto/ p. 241 IAU Pluto decision
minorplanetcenter.net/iau/MPEph/MPEph.html p. 244 Asteroid orbital elements
poyntsource.com/New/RASC_Events.htm p. 248 Interactive maps, star lists
poyntsource.com/New/Global.htm p. 248 Interactive maps, star lists
occultwatcher.net p. 248 Asteroidal occultation finder
lucy.swri.edu//occ/20211020Eurybates.html p. 249 Eurybates occultation information
www.ta3.sk/IAUC22DB/MDC2007/Dokumenty
/shower_nomenclature.php
p. 252 Meteor shower naming conventions
fireball.amsmeteors.org/members/imo/report_intro/ p. 256 Fireball observations for North America
imo.net/fireball/report p. 256 IMO Fireball Reports (global)
meteoritical.org/about-meteorites/meteorite-names p. 257 Meteoritical Society naming committee
lpi.usra.edu/meteor/ p. 257 Meteoritical Bulletin database
curator.jsc.nasa.gov/antmet/lmc/index.cfm p. 258 Lunar meteorites
meteorites.wustl.edu/lunar/moon_meteorites.htm p. 258 Lunar meteorites
curator.jsc.nasa.gov/antmet/mmc/index.cfm p. 258 Martian meteorites
sites.wustl.edu/meteoritesite p. 258 Martian meteorites
passc.net/EarthImpactDatabase p. 260 Meteorite crater database
minorplanetcenter.net/iau/Ephemerides/Comets p. 264 Comet ephemerides
icq.eps.harvard.edu/CometMags.html p. 264 Comet magnitudes
minorplanetcenter.net/iau/MPEph/MPEph.html p. 264 Comet orbital elements
minorplanetcenter.net/iau/lists/CometResolution p. 267 Comet designation convention
cbat.eps.harvard.edu/cometnameg p. 267 Comet naming convention
phys.unm.edu/~tw/spectra/mk.html p. 284 Spectra classification
ned.ipac.caltech.edu/level5/Gray/frames.html p. 284 Richard Gray’s Digital Spectral Classification Atlas
appstate.edu/~grayro/MK/winmk.htm p. 284 Digital Spectral Comparisons (Windows)
appstate.edu/~grayro/spectrum/ftp/download.html p. 284 Digital Spectral Comparisons (Linux)
rspec-astro.com/star-analyser/ p. 284 Star Analyser
go.uis.edu/gratingspectra p. 284 Slitless spectroscopy
rspec-astro.com/sample-projects/ p. 284 Spectroscopy examples
astrosurf.com/buil/index.html p. 284 Spectroscopy examples
menkescientific.com/johnspage.html p. 284 Spectroscopy examples
go.uis.edu/gratingspectra p. 284 Processing spectra
aavso.org/observing-campaigns#current p. 284 AAVSO Observing Campaigns
recons.org p. 287 RECONS database
jdso.org p. 291 Electronic journal for double-star observing
tdc-harvard.edu/catalogs/sao.html p. 296 SAO Star Catalog
aavso.org/vsx p. 299 Eclipsing binaries database
rr-lyr.irap.omp.eu/dbrr/index.php p. 299 RR Lyr Database
earthsky.org/space/star-trek-planet-vulcan-40-eridani-a/ p. 304 Spock's Star
clarkvision.com/ p. 309 Star size and surface brightness
univie.ac.at/webda/navigation.html p. 311 Open Clusters lists
physics.mcmaster.ca/~harris/mwgc.dat p. 312 Globular cluster data
rasc.ca/handbook/supplements p. 321 Dark nebulae information
nedipac.caltech.edu/level5 p. 334 NED compilation
radio-astronomy.org p. 338 Society of Amateur Radio Astronomers
ukaranet.org.uk p. 338 UK Amateur Radio Astronomy Network
rascoc.zenfolio.com/f339290108 p. 338 Okanagan Centre Radio-Astronomy Group images

Web Resources for the USA Edition

Listing of Web Resources, where they differ, for the 2021 USA Edition of the Observer’s Handbook

acadianightskyfestival.org p. 11 Acadia Night Sky Festival—Bar Harbor, Maine
fi.edu/exhibit/observatory p. 11 Franklin Institute Bloom Observatory—Philadelphia, Pennsylvania
astrohbg.org/public-observing p. 12 Harrisburg Star Party—Harrisburg, Pennsylvania
cherrysprings.org p. 12 Cherry Springs Star Party—Cherry Springs S.P., Coudersport, PA
chaosastro.org/starparty p. 12 Staunton River Star Party—Halifax County, Virginia
ahsp.org p. 12 Almost Heaven Star Party—Spruce Knob, West Virginia
greenbankstarquest.org p. 12 Green Bank Star Quest—Green Bank, West Virginia
mvas.org p. 12 Apollo Rendezvous—John Bryan State Park, Ohio
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
nebraskastarparty.org p. 12 Nebraska Star Party—Valentine, Nebraska
okie-tex.com p. 12 Okie-Tex Star Party—Camp Billy Joe, Oklahoma
rmss.org p. 12 Rocky Mountain Star Stare—Gardner, Colorado
enchantedskies.org/essp/index.html p. 12 Enchanted Skies Star Party—Magdalena, New Mexico
ifastro.org p. 12 Craters of the Moon Star Party—Craters of the Moon, New Mexico
bigskyastroclub.org p. 13 Logan Pass Star Party—West Glacier, Montana
boiseastro.org/isp.html p. 13 Idaho Star Party—Bruneau Dunes State Park, Idaho
www.oasisatdeathvalley.com/plan/stargazing p. 13 Death Valley Star Party—Death Valley, California
goldenstatestarparty.org p. 13 Golden State Star Party—Bieber, California
dmns.org p. 14 Denver Museum of Nature and Science—Denver
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, March 16, 2021 - 11:34pm