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PH Express Links

Prentice Hall presents fast, easy links to our favorite Web sites.

The following list contains links to many of the most interesting and informative Web sites related to topics explored in the chapter. Check them out, but make sure you come back to do more investigating when you're done.
Our Web Resource "Exploring Key Terms" can help you search, too.


American Meteor Society
The American Meteor Society, founded in 1911, is an organization of amateur and professional meteor scientists and observers, with a common goal of studying meteors, bright fireballs, the annual meteor showers, and the random sporadic meteors that appear every night.
Association of Lunar & Planetary Observers
Founded by Walter Haas in 1947, the A.L.P.O. now has about 600 members.
Astrogeology Research Program (USGS)
The Astrogeology Research Program is a team of over 80 research scientists, cartographers, computer scientists, administrative staff, students, contractors, and volunteers working to support the efforts to explore, map, and understand our solar system. Fields of particular interest are mapping, planetary geologic processes, remote sensing and monitoring, and scientific analysis, which leads to answers about our neighboring planets.
Asteroid 1997 XF11 (Earth close-approach)
A report on the near-Earth asteroid 1997 FX11, which will make a close approach to Earth on October 26, 2028.
Asteroid and Comet Impact Hazards
An excellent presentation of asteroid and comet impact hazards prepared by NASA.
British Astronomical Association
The British Astronomical Association is a national organization, founded in 1890, which encourages amateur astronomy through meetings, sectional groups, and its publications.
Cassini-Huygens: Voyage to Saturn
Home page of NASA's Cassini mission to Saturn.
Comets, Asteroids, and Interplanetary Dust (PDS)
NASA's Planetary Data System (PDS) Small Bodies Node (SBN) is concerned with gathering, restoring, and archiving data sets related to comets, asteroids, and interplanetary dust.
Dan's Home Page
A good source for astronomy information and planet events.
Earth Close Approaches (IAU)
The International Astronomical Union's (IAU) list of the predicted minor-planet and comet encounters to within 0.2 AU of Earth during the next 33 years (from the start of 1998).
Image and Animation Index
Links to images on almost every aspect of astronomy.
Impact Craters of the World
A great source for information about terrestrial impact craters.
International Meteor Organization
A great site for up-to-date information.
International Space Station (NASA)
Keep up with the space-station crew at this interactive Web site packed with news, images, and timetables.
Jet Propulsion Laboratory (JPL)
National Aeronautics and Space Administration (NASA) Jet Propulsion Laboratory (JPL) home page.
Jupiter—Galileo Project Home Page (JPL)
Home page of NASA's Jupiter Galileo project.
LINEAR Project
The goal of the LINEAR project is to demonstrate the application of technology originally developed for the surveillance of Earth-orbiting satellites, to the problem of detecting and cataloging Near Earth Asteroids (also referred to as Near Earth Objects, or NEOs) that threaten the Earth.
Lunar and Planetary Institute (LPI)
NASA's Lunar and Planetary Institute (LPI) is a focus for academic participation in studies of the current state, evolution, and formation of the solar system.
Magellan Mission Images
Magellan mission to Venus image server.
Mars Atlas (NASA)
NASA's interactive Mars Atlas.
Mars Global Surveyor (NASA)
Mars Global Surveyor mission home page.
Mars Images, Malin Space Science Systems
Malin Space Science Systems (MSSS) designs, develops, and operates instruments that fly on robotic spacecraft, including Mars Global Surveyor and Mars Odyssey. The site contains a very extensive gallery of downloadable Mars images.
Mars Meteorite (LPI)
A detailed presentation on the Mars meteorite and the possibility that life may have existed on the planet.
Mars Missions
Information on NASA's planned missions to Mars.
MarsNet is the WWW arm of the International Mars Watch, a group founded by professional astronomers interested in Mars to facilitate better communication between the amateur and professional Mars observing communities. In these pages, you will find images of Mars contributed by amateurs and professional, tools to aid you in planning your own Mars observations, current and past issues of the International Mars Watch Electronic Newsletter, and links to other Mars-relevant sites on the Internet.
Mars Pathfinder Mission (NASA)
Mars Pathfinder mission home page.
Mars (Virtual Mission)
Take a virtual trip to the "Red" planet by visiting this simulated Mars colony.
Meteor Crater, AZ
Home page of Meteor Crater Enterprises, a private enterprise that operates the visitor's center at Meteor Crater.
Minor Planet Center (IAU)
The Minor Planet Center of the International Astronomical Union is responsible for the efficient collection, computation, checking and dissemination of astrometric observations and orbits for minor planets and comets.
Moon and Planet Images (LPI)
Moon and planet images from NASA's Lunar and Planetary Institute (LPI).
Near-Earth Asteroid Rendezous (NEAR) Mission
The Near-Earth Asteroid Rendezvous (NEAR) mission is the first launch in the Discovery Program, a NASA initiative for small planetary missions with a maximum 3-year development cycle. As the first spacecraft to orbit an asteroid, the NEAR mission promises to answer fundamental questions about the nature and origin of Near-Earth objects, such as the numerous asteroids and comets in the vicinity of Earth's orbit.
NEO (Near-Earth Object) Page
The NEO Page lists local links dealing specifically with Near-Earth Objects (NEOs).
New England Meteoritical Services
A great site for information on meteorites.
North American Meteor Network
The North American Meteor Network recruits amateurs as meteor observers, trains amateurs in the methods of meteor observation, and coordinates North American observations.
Observatorium (NASA)
NASA's Observatorium is a public access site for Earth and space data. Included are pictures of the Earth, planets, stars, and other cool stuff, as well as the stories behind these images. A definite place to visit.
Planetary Data System (NASA)
NASA's Planetary Data System (PDS) archives and distributes scientific data from NASA planetary missions, astronomical observations, and laboratory measurements.
Planetary Fact Sheets (NASA)
An index to fact sheets for the planets and other solar system objects from the National Aeronautics and Space Administration (NASA).
Planetary Geologic Mapping Program (NASA)
Your home page for planetary geology maps and related information.
Planetary Geology
An excellent overview of the planets from the W. H. Freeman Company.
Planetary Image Facility
Planetary science images from the Regional Planetary Image Facility at the Center for Earth and Planetary Studies (CEPS).
Planetary Society
The Planetary Society home page is a great place to connect to sites related to the exploration of the cosmos and the search for extraterrestrial life and intelligence.
Pluto-Kuiper Probe (New Horizons Mission)
Here is the home page of NASA's Pluto-Kuiper probe, New Horizons Mission.
The Puckett Observatory
The Puckett Observatory's search teams are amateur astronomers dedicated to hunting for comets and supernovae.
Solar System Collision Calculator
An interesting site to investigate the consequences of impacts. Give it a try.
Solar System Live
Current locations of the planets.
Solar System Overview
An excellent overview of the solar system by Calvin J. Hamilton.
Solar System Photographs (NASA)
The National Aeronautics and Space Administration's (NASA) solar system photogallery.
Solar System Simulator (NASA)
Use this National Aeronautics and Space Administration (NASA) Web site to create an image of a planet or satellite from any reference point in the solar system.
Stardust Mission (NASA)
Stardust is the space mission that will fly close to a comet and, for the first time ever, bring cometary material back to Earth for analysis by scientists worldwide.
Terrestrial Impact Craters
Information on terrestrial impact craters formed when a large meteorid, asteroid, or comet smashes into a planet or a satellite.


Apollo Mission
The history of the Apollo lunar missions from the National Air and Space Museum.
Artemis Project
Artemis is a private venture to establish a permanent, self-supporting community on the Moon. Here you will find out how they are going to get there, how they are going to pay for it, and how you go!
Association of Lunar & Planetary Observers
Founded by Walter Haas in 1947, the A.L.P.O. now has about 600 members.
Clementine Mission Images
Detailed images of the Moon's surface from the Navy's Clementine lunar mission.
Inconstant Moon
The Inconstant Moon offers great multimedia tours of the lunar surface.
Lunar and Planetary Institute (LPI)
NASA's Lunar and Planetary Institute (LPI) is a focus for academic participation in studies of the current state, evolution, and formation of the solar system.
Lunar Eclipse Finder
A great eclipse site from the Calwell Lunar Observatory, Australia.
Lunar Exploration (NSSDC)
A history of NASA's missions to the Moon from the National Space Science Data Center (NSSDC).
Lunar History (NASA)
A good, short discussion of the history of the Moon from the National Aeronautics and Space Administration (NASA).
Lunar Geology (NASA)
Lunar geology from the National Aeronautics and Space Administration (NASA).
Lunar Ice
A discussion of ice on the Moon from NASA.
Lunar Phases (NASA)
Phases of the moon.
Lunar Phases Virtual Reality Pictures
These "Virtual Reality Moon Phases" were created from ray-traced images of the Moon. A Clementine spacecraft mosaic of the lunar surface was mapped onto a sphere, and scenes were rendered as a virtual Sun "orbited" the Moon. The depiction of lunar surface features suffers geometric distortion but the terminator is correct with respect to the spherical Moon.
Lunar Prospector Mission (NASA)
NASA's Lunar Prospector home page.
A very well done and comprehensive site that includes many links to more in-depth information.
Moon Activities
Several Moon activities from the Hands-On Universe.
Moon and Sun Data
Moon and Sun rise and set data, eclipse information, Moon phases, etc. from the U.S. Naval Observatory.
Moon Overview
An excellent source of information about the Moon.
Moon Phases
An explanation of the phases of the Moon from the University of Michigan.

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