| Apparent Visual Magnitudes |
|---|
| Messier objects sorted by apparent visual magnitudes |
| URL: http://bozo.lpl.arizona.edu/messier/dataMag.html |
| Apparent Visual Magnitude and Absolute Visual Magnitude |
|---|
| An online resource to discuss the difference between these two concepts. |
| URL: http://snoopy.gsfc.nasa.gov/~orfeus2/vismag.html |
| The Astronomical Magnitude Scale |
|---|
| Historical use of and explanation of apparent visual magnitudes. |
| URL: http://liftoff.msfc.nasa.gov/academy/universe/mag.html |
| Presentation of Apparent Magnitude Scale, with Common Celestial Objects |
|---|
| An online resource to discuss apparent magnitude scale |
| URL: http://cfa-www.harvard.edu/cfa/ps/icq/MagScale.html |
| Sky Maps and Constellations |
|---|
| An online resource on sky maps and constellations |
| URL: http://www.maa.mhn.de/Maps/Const/constS.html |
| Constellations |
|---|
| Listing of all 88 constellations with links |
| URL: http://www.seds.org/Maps/Const/constS.html |
| Ancient Constellation Maps |
|---|
| Celestial cartography, with drawings of constellation figures. |
| URL: http://www.maa.mhn.de/Maps/Const/constS.html |
| Movie of Annular Eclipse |
|---|
| 350K Mpg movie of an annular eclipse. |
| URL: http://www.astro.indiana.edu/animations/eclipse.mpg |
| Solar Eclipse Bulletins |
|---|
| Index to resources of the Solar Data Analysis Center |
| URL: http://umbra.nascom.nasa.gov/sdac.html |
| Cycle of the Moon |
|---|
| Tutorial on phases of the Moon, including quiz.me movie |
| URL: http://www-astro.physics.uiowa.edu/~lam/teaching/moon/ |
| History of Astronomy |
|---|
| Links to resourses for the history of astronomy. |
| URL: http://www.astro.uni-bonn.de/~pbrosche/astoria.html#astr |
| Ptolemy's Star Map |
|---|
| Exerpts of the astronomy of Ptolemy in the second century A.D. |
| URL: http://metalab.unc.edu/expo/vatican.exhibit/exhibit/d-mathematics/Greek_astro.html |
| Johannes Kepler and his Three Laws |
|---|
| Short history of Kepler and mathematical treatment of his Three Laws of Planetary Motion. |
| URL: http://www.cvc.org/science/kepler.htm |
| Kepler's Star |
|---|
| Historical map of Kepler's star (a nova) in the year 1604. |
| URL: http://www.lhl.lib.mo.us/pubserv/hos/stars/kep__.htm |
| People in Astronomy |
|---|
| Listing of people who have made contributions to astronomy. |
| URL: http://www.hawastsoc.org/solar/eng/people.htm |
| Women in Astronomy |
|---|
| Homepage of the Committee on the Status of Women in Astronomy |
| URL: http://www.hawastsoc.org/solar/eng/people.htm |
| Electromagnetic Spectrum |
|---|
| Tutorial on electromagnetic radiation and its relationship to temperature. |
| URL: http://oposite.stsci.edu/pubinfo/education/amazing-space/light/star-light-science.html |
| World's Largest Telescopes |
|---|
| Largest telescopes in the world with their characteristics and locations, with links to homepages |
| URL: http://www.seds.org/billa/bigeyes.html |
| Astronomical Observatories |
|---|
| Listings of major ground-based telescopes. |
| URL: http://ranier.oact.hq.nasa.gov/Sensors_page/GroundObserv.html |
| Telescopes |
|---|
| Listings of major ground-based telescopes and space telescopes |
| URL: http://www.w3.org/Out-Of-Date/hypertext/DataSources/bySubject/astro/observatories.html |
| Keck Observatory |
|---|
| activities and research with the largest optical telescope in the world on Mauna Kea, Hawaii. |
| URL: http://www2.keck.hawaii.edu:3636/ |
| Kitt Peak |
|---|
| HomePage of a telescope facility located in Arizona. |
| URL: http://www.noao.edu/kpno/kpno.html |
| Anglo-Australian Observatory |
|---|
| HomePage of a major telescope facility located in Australia |
| URL: http://www.noao.edu/kpno/kpno.html |
| Infrared Telescope Facility |
|---|
| The NASA Infrared Telescope Facility on Mauna Kea, Hawaii, including photos. |
| URL: http://irtf.ifa.hawaii.edu/ |
| National Radio Astronomical Observatory |
|---|
| HomePage of the organization that oversees the various radio telescopes, with links to each. |
| URL: http://www.nrao.edu/ |
| Hubble Space Telescope |
|---|
| HomePage of the organization that operates the Hubble Space Telescope, with links to photos, |
| URL: http://www.stsci.edu/top.html |
| Advanced X-ray Facility |
|---|
| Development of an X-ray satellite that will be launched in 03 December 1998. |
| URL: http://asc.harvard.edu/ |
| Space Infrared Telescope Facility |
|---|
| HomePage of the satellite-borne telescope that maps the sky in the infrared. |
| URL: http://sirtf.jpl.nasa.gov/sirtf/home.html |
| Compton Gamma Ray Observatory |
|---|
| HomePage of the satellite-borne telescope that maps the sky in the X-ray. |
| URL: http://cossc.gsfc.nasa.gov/ |
| Blackbody Curves |
|---|
| Electromagnetic energy and energy curves of stars related to their temperatures. |
| URL: http://oposite.stsci.edu/pubinfo/education/amazing-space/light/star-light-science.html#stellar |
| Stellar Spectra |
|---|
| Laboratory experiments offered by the Dept. of Physics, Gettysburg College, Gettysburg Pa. |
| URL: http://www.gettysburg.edu/academics/physics/clea/speclab.html |
| Skyview Maps |
|---|
| Virtual Observatory that generates images of any part of the sky. |
| URL: http://skyview.gsfc.nasa.gov/skyview.html |
| Flow of Energy out of Sun |
|---|
| Laboratory experiments offered by the Dept. of Physics, Gettysburg College, Gettysburg Pa. |
| URL: http://www.gettysburg.edu/academics/physics/clea/sunlab.html |
| Daily Sun Images and Space Weather |
|---|
| Images of solar surface on a daily basis, and forecast of auroral activities affecting Earth. |
| URL: http://www.sel.noaa.gov/ |
| Mees Solar Observatory |
|---|
| HomePage of solar observatory located on Maui, Hawaii. Provides current data on Sun. |
| URL: http://www.solar.ifa.hawaii.edu/mees.html |
| National Geophysical Data Center |
|---|
| Solar-terrestrial physics and links to organizations that provide information on space weather. |
| URL: http://www.ngdc.noaa.gov/ |
| Aurora Report |
|---|
| Photographs and background info on auroras as well as links to organizations that study them. |
| URL: http://www.geo.mtu.edu/weather/aurora/ |
| Solar Features and Satellite Missions |
|---|
| Links to features and characteristics of Sun, also satellite missions to study Sun from space. |
| URL: http://wwwssl.msfc.nasa.gov/ssl/pad/solar/ |
| SOHO Mission |
|---|
| HomePage of solar satellite (joint NASA-ESA project) currently providing important solar data. |
| URL: http://sohowww.nascom.nasa.gov/ |
| Ulysses Mission |
|---|
| NASA's HomePage for the Ulysses satellite that is currently orbiting Sun |
| URL: http://ulysses.jpl.nasa.gov/ |
| Inverse-Square Law |
|---|
| Large movie (440kb) demonstrating the inverse-square law of radiation and gravity. |
| URL: http://zebu.uoregon.edu/textbook/inv.html |
| Variable Stars |
|---|
| HomePage of American Association of Variable Star Observers, with links to information. |
| URL: http://www.aavso.org/ |
| Evolution of Star Clusters |
|---|
| Tutorial on evolution of star clusters as shown by plots of stars on H-R diagrams. |
| URL: http://zebu.uoregon.edu/textbook/sc.html |
| Absolute Visual Magnitude |
|---|
| Discussion of difference between apparent visual magnitude and absolute visual magnitude. |
| URL: http://snoopy.gsfc.nasa.gov/~orfeus2/vismag.html |
| Messier Objects |
|---|
| Historical sketch of Messier's work, and listing of Messier objects, text and photographs. |
| URL: http://www.nerdnet.nl/~angelo/phoenix/messier/Messier.html |
| Interstellar Medium |
|---|
| Text, photographs and audio narration of interstellar reddening and reflection nebulae. |
| URL: http://zebu.uoregon.edu/textbook/ism.html |
| Images of Star-Forming Regions |
|---|
| Astronomy Picture of the Day: Bok globules and their association with star formation. |
| URL: http://antwrp.gsfc.nasa.gov/apod/ap951006.html |
| Flow of Energy out of Sun |
|---|
| laboratory experiments offered by the Dept. of Physics, Gettysburg College, Gettysburg Pa. |
| URL: http://www.gettysburg.edu/project/physics/clea/sunlab.html |
| Proton-Proton Chain |
|---|
| Animation and text of the sequence of events responsible for the generation of energy in stars. |
| URL: http://zebu.uoregon.edu/textbook/energygen.html |
| Deaths of Stars |
|---|
| Tutorial on deaths of different mass stars, links to text material and occasional diagram. |
| URL: http://www.physics.gmu.edu/classinfo/astr103/CourseNotes/ECText/ch18_txt.htm#18.3 |
| Eclipsing Binary Stars |
|---|
| Laboratory experiments offered by the Dept. of Physics, Gettysburg College, Gettysburg Pa. |
| URL: http://www.gettysburg.edu/academics/physics/clea/binstlab.html |
| The Story of Supernova 1987A |
|---|
| Events surrounding the discovery and study of a supernova in the Magellanic Cloud galaxy. |
| URL: http://zebu.uoregon.edu/~soper/StarDeath/sn1987a.html |
| Radio Astronomy of Pulsars |
|---|
| Laboratory experiments offered by the Dept. of Physics, Gettysburg College, Gettysburg Pa. |
| URL: http://www.gettysburg.edu/academics/physics/clea/plsrlab.html |
| Animation of Pulsar |
|---|
| Large file (554kb) of mpg movie illustrating the appearance of a pulsar. |
| URL: http://oposite.stsci.edu/pubinfo/mpeg/crabmov.mpg |
| Falling into a Black Hole |
|---|
| Resource that portrays the behavior of matter close to a black hole, as well as events associated. |
| URL: http://casasrv.colorado.edu/~ajsh/schw.shtml |
| Virtual Trip to a Black Hole |
|---|
| Simulation of the appearance and behavior of objects in the vicinity of a black hole. |
| URL: http://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html |
| Survey |
|---|
| General description of components of our Galaxy |
| URL: http://www.nerdnet.nl/~angelo/phoenix/messier/more/mw.html |
| Motions of Stars |
|---|
| Animation (2.7MB download) of motions of stars in a galaxy. |
| URL: http://www.astro.indiana.edu/animations/ |
| Messier Objects |
|---|
| List of Messier objects, including links to photographs, questions and answers. |
| URL: http://www.seds.org/messier/ |
| Virtual Trip to a Black Hole |
|---|
| Simulation of the appearance and behavior of objects in the vicinity of a black hole |
| URL: http://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html |
| Galaxy Cluster |
|---|
| Animation (3.4MB download) of motions of galaxies in a cluster. |
| URL: http://www.astro.indiana.edu/animations/ |
| Images |
|---|
| Links to photographs of individual galaxies, listed by Messier number. |
| URL: http://www.seds.org/messier/objects.html#galaxy |
| Properties of M31 (Andromeda galaxy) |
|---|
| Mpeg movie (1.2MB) of properties and structure of M31. |
| URL: http://zebu.uoregon.edu/textbook/galaxies.html |
| Groups and Clusters of Galaxies |
|---|
| Listing of groups or clusters of galaxies containing at least two Messier objects. |
| URL: http://bozo.lpl.arizona.edu/messier/g-group.html |
| More Groups and Clusters of Galaxies |
|---|
| Links to information on specific groups and clusters |
| URL: http://www.nerdnet.nl/~angelo/phoenix/messier/gal_clus.html |
| Interacting Galaxies |
|---|
| Twelve pairs of interacting galaxies, with links to information about each. |
| URL: http://crux.astr.ua.edu/white/pairs/individual.html |
| Galaxy Catalog |
|---|
| A catalog of digital images of 113 nearby galaxies. |
| URL: http://www.astro.princeton.edu/~frei/ |
| Hubble Deep Field |
|---|
| Hubble Deep Field study, including high-resolution images. |
| URL: http://oposite.stsci.edu/pubinfo/PR/96/01.html |
| Quasars |
|---|
| QT movie (1.1MB) of events associated with energies with quasar. |
| URL: http://oposite.stsci.edu/pubinfo/mpeg/quasar.mpg |
| Timeline of the Universe |
|---|
| Timeline of important events in the evolution of the universe. |
| URL: http://origins.jpl.nasa.gov/poster/poster.html |
| Redshift Distances |
|---|
| Laboratory experiments offered by the Dept. of Physics, Gettysburg College, Gettysburg Pa. |
| URL: http://www.gettysburg.edu/academics/physics/clea/hublab.html |
| Big Bang Nucleosynthesis |
|---|
| Analysis of light element abundances in the universe as verification of Big Bang theory. |
| URL: http://cfpa.berkeley.edu/darkmat/bbn.html |
| Large-Scale Structure of Universe |
|---|
| Laboratory experiments offered by the Dept. of Physics, Gettysburg College, Gettysburg Pa. |
| URL: http://www.gettysburg.edu/academics/physics/clea/univlab.html |
| Dark Matter |
|---|
| The MACHO Project: A program to detect dark matter by microlensing, including results to date. |
| URL: http://wwwmacho.anu.edu.au/ |
| COBE |
|---|
| The Cosmic Background Explorer, satellite designed to detect radiation left over from Big Bang. |
| URL: http://www.gsfc.nasa.gov/astro/cobe/cobe_home.html |
| Origin of Structure in the Universe |
|---|
| The origin of structure in the universe and its relationship to the cosmic background radiation. |
| URL: http://cobi.gsfc.nasa.gov/msam-ripples.html |
| Model Simulation of Early Universe |
|---|
| Parallel computers attempting to model the early history of the universe and galaxies. |
| URL: http://zeus.ncsa.uiuc.edu:8080/GC3_Home_Page.html |
| Meteors |
|---|
| International Meteor Organization Home Page. |
| URL: http://www.imo.net/ |
| Meteors |
|---|
| American Meteor Society Home Page. |
| URL: http://www.serve.com/meteors/ |
| North American Meteor Network |
|---|
| Provides specific information on observing and submitting reports on meteor showers. |
| URL: http://medicine.wustl.edu/~kronkg/namn.html |
| Meteorobs |
|---|
| An email discussion group devoted to observing meteors and meteor showers. |
| URL: http://www.tiac.net/users/lewkaren/meteorobs/ |
| Views of the Solar System |
|---|
| Links to data and photographs of the planets. |
| URL: http://www.hawastsoc.org/solar/eng/homepage.htm |
| Formation of Solar System |
|---|
| List of the events during the history of the early solar system. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/origin.html |
| Welcome to the Planets |
|---|
| Links to sites on the Web that contain information and photographs of the planets and satellites. |
| URL: http://pds.jpl.nasa.gov./ |
| General |
|---|
| Homepage of the National Space Science Data Center |
| URL: http://nssdc.gsfc.nasa.gov/planetary/planetary_home.html |
| 3-D Tour of the Solar System |
|---|
| 3-D images of selected objects in the solar system. 3-D glasses are required for viewing. |
| URL: http://cass.jsc.nasa.gov/research/stereo_atlas/HTDOCS/WELCOME.HTM |
| ExtraSolar Planets |
|---|
| research related to the search for planets around other stars, with links to sites. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/other.html |
| Earth and Moon Viewer |
|---|
| User views either Moon or Earth from imaginary position above Earth, or of backside of Moon. |
| URL: http://www.fourmilab.ch/earthview/vplanet.html |
| Earth Survey |
|---|
| Detailed description of Earth as a planet. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/earth.html |
| Plate Tectonics |
|---|
| Earth's Geology, Diagrams and text. |
| URL: http://observe.ivv.nasa.gov/nasa/earth/tectonics/Tectonics1.html |
| Moon Survey |
|---|
| Detailed description of Moon as a satellite, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/luna.html |
| Lunar and Planetary Institute |
|---|
| Reports on research conducted about Moon and planets and Links to lunar research. |
| URL: http://cass.jsc.nasa.gov/lpi.html |
| Radar Studies of Rotation of Mercury |
|---|
| Laboratory experiments offered by the Dept. of Physics, Gettysburg College, Gettysburg Pa.. |
| URL: http://www.gettysburg.edu/academics/physics/clea/merlab.html |
| Mercury Survey |
|---|
| Description of Mercury as a planet, with links to sites covering related. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/mercury.html |
| Venus Survey |
|---|
| Description of Venus as a planet, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/venus.html |
| Magellan Mission |
|---|
| Survey of mission to Venus to conduct radar-imaging of planet. |
| URL: http://www.jpl.nasa.gov/magellan/ |
| Magellan Images |
|---|
| Access to images taken by Magellan satellite by reference number. |
| URL: http://delcano.mit.edu/cgi-bin/midr-query |
| Venus Surface |
|---|
| Discussion of surface features on Venus imaged by various satellites. |
| URL: http://www.eps.mcgill.ca/~bud/craters/FaceOfVenus.html |
| Mars Survey |
|---|
| Description of Mars as a planet, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/mars.html |
| Mars Atlas |
|---|
| Explore surface features on Mars by interacting with an atlas of the Martian surface. |
| URL: http://www-pdsimage.wr.usgs.gov/PDS/public/mapmaker/ |
| Exploration of Mars |
|---|
| Links to sites relating to past, present and future investigations of Mars. |
| URL: http://www.mae.ncsu.edu/mmrc/index.html |
| Center for Mars Exploration |
|---|
| NASA-Ames links to the results of past missions to Mars, and information on future missions. |
| URL: http://cmex-www.arc.nasa.gov/ |
| Global Surveyor Project |
|---|
| The status of the Global Surveyor satellite that is currently imaging Mars. |
| URL: http://mars.jpl.nasa.gov/mgs/ |
| Martian Meteorite |
|---|
| Discussion of meteorite ALH 84001. |
| URL: http://cass.jsc.nasa.gov/lpi/meteorites/mars_meteorite.html |
| Jupiter Survey |
|---|
| Jupiter as a planet, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/jupiter.html |
| Galileo Mission |
|---|
| Discussion of and links to photographs taken by the Galileo satellite at Jupiter. |
| URL: http://www.jpl.nasa.gov/galileo/sepo/ |
| Shoemaker-Levy 9 Impact on Jupiter |
|---|
| Photographs taken during the collision of comet Shoemaker- Levy 9 with Jupiter in 1995. |
| URL: http://www.jpl.nasa.gov/sl9/ |
| Saturn Survey |
|---|
| Description of Saturn as a planet, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/saturn.html |
| NASA Planetary Rings |
|---|
| Links to sites containing detailed studies of rings of the four Jovian satellites. |
| URL: http://ringside.arc.nasa.gov/ |
| Saturn Ring-Plane Crossing |
|---|
| Research conducted during Earth's ring-crossing of Saturn in 1994-95. |
| URL: http://ringside.arc.nasa.gov/www/rpx/rpx.html#viewer |
| Cassini Mission |
|---|
| HomePage of JPL's Cassini satellite to Saturn and its satellite Titan. |
| URL: http://www.jpl.nasa.gov/cassini/ |
| Uranus Survey |
|---|
| Neptune as a planet, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/uranus.html |
| Neptune Survey |
|---|
| Neptune as a planet, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/neptune.html |
| Pluto Survey |
|---|
| Pluto as a planet, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/pluto.html |
| Project Pluto |
|---|
| Information on proposed mission to visit Pluto. |
| URL: http://www.projectpluto.com/ |
| Meteorite Survey |
|---|
| Description of meteorites, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/meteorites.html |
| Meteorites in Antarctica |
|---|
| Meteorites found in Antarctica, and what research tells us about the origin of the solar system. |
| URL: http://www-curator.jsc.nasa.gov/curator/antmet/antmet.htm |
| Minor Planet Center |
|---|
| Smithsonian Astrophysical Observatory's Minor Planet Center. how to report asteroids. |
| URL: http://cfa-www.harvard.edu/cfa/ps/mpc.html |
| Terrestrial Impact Craters |
|---|
| Discussion of known and suspected impact craters on Earth, and photographs and maps of sites |
| URL: http://cass.jsc.nasa.gov/publications/slidesets/impacts.html |
| Comet Survey |
|---|
| Description of comets, with links to sites covering related topics. |
| URL: http://seds.lpl.arizona.edu/nineplanets/nineplanets/comets.html |
| Comet Collisions with Earth |
|---|
| Discussion of impact that occurred on the Yucatan Peninsula in Mexico. |
| URL: http://antwrp.gsfc.nasa.gov/cgi-bin/cossc/apod_search?chicxulub |
| Comet Hale-Bopp |
|---|
| JPL's HomePage on Comet Hale-Bopp, including links to photographs and sky maps. |
| URL: http://www.jpl.nasa.gov/comet/index.html |
| Meteor Showers |
|---|
| Information on interesting fireballs, historical accounts, and radio meteor reports. |
| URL: http://medicine.wustl.edu/~kronkg/meteor_shower.html |
| Meteor Shower Calendar |
|---|
| Calendar of major and meteor showers, including phase of moon. |
| URL: http://medicine.wustl.edu/~kronkg/calendar.html |
| SETI Institute |
|---|
| The organization program that searches for signals from distant civilizations. |
| URL: http://www.seti-inst.edu/ |
| The SETI League |
|---|
| A non-profit, educational and scientific organization searching for extra-terrestrial intelligence. |
| URL: http://www.setileague.org/ |
| Space Settlements |
|---|
| NASA's HomePage on orbital space settlements. |
| URL: http://science.nas.nasa.gov/Services/Education/SpaceSettlement/ |
| Design of Space Stations |
|---|
| Links to criteria used in construction of space stations, based upon 1975 study. |
| URL: http://science.nas.nasa.gov/Services/Education/SpaceSettlement/75SummerStudy/Table_of_Contents1.html |