Extrasolar Planets

• Another Planet is Found that Circles its Own Sun
• Are We Unique?
• Discovery of Extrasolar Planets
• Discovery of 3 Planets around Upsilon Andromedae
• Discovery of 51 Peg
• Extrasolar Planets
• Extrasolar Planets
• Extrasolar Planets Catalog
• Extrasolar Planets Encyclopedia
• Habitability of Worlds
• New Planets
• Other Solar Systems
• Other Worlds & Martian Life
• Planet Project
• Planetary Systems
• Searching for Other Worlds
• Yahoo! Extrasolar Planets
• Top of Page

 Astrobiology

• Amateur SETI: Project BAMBI
• Astrobiology at NASA
• Astrobiology Institute
• Astrobiology Web
• Columbus Optical SETI Observatory
• Drake Equation
• Drake Equation
• Drake Equation
• Drake Equation
• Drake Equation Terms: The Fraction of Life Sites Where Intelligence Develops
• Exobiology
• Intelligent Life in the Universe
• Life Beyond Earth
• Life in the Universe
• NOVA: Hunt for Alien Worlds
• Optical SETI
• Planetary Society's Search
• Project Phoenix
• Sci.Astro ET Life FAQs
• Science Behind the Extraterrestrial Phenomenon
• Search for Extra Terrestrial Intelligence at Home
• Search for Extraterrestrial Life
• Search for Life in the Universe Tutorial
• SERENDIP Project
• SETI: Drake Equation
• SETI Institute
• SETI League
• SETIQuest
• U.C. Berkeley Center for Extraterrestrial Civilizations
• Universe & the Origin of Life
• What is the Drake Equation?
• Where is Everyone?
• Top of Page

 Astrophysics

• Acceleration
• Astrophysics 29
• Basic Physics of Orbits
• Bode's Law
• Bode's Law
• Bode's Law
• Bode's Law
• Bode-Titus Law
• Center for Particle Astrophysics
• Classical Mechanics
• Development of Modern Astrophysics
• Escape & Orbital Velocities
• Forces & Fields
• Forces & Newton's Laws
• Fundamental Forces
• Gravitational Perturbations & the Prediction of New Planets
• Harvard-Smithsonian Center for Astrophysics
• High Energy Astrophysics
• How Orbits Work
• Kepler's Laws
• Kepler's Laws
• Kepler's Laws with Animation
• Kepler's Laws of Planetary Motion
• Kepler's Laws of Planetary Motion
• Kepler's Laws of Planetary Motion with Animation
• Laser Star Astrophysics
• Motion, Gravity & Orbits I
• Motion, Gravity & Orbits II
• Movies from the Edge of Spacetime
• NASA Astrophysics Data Services (ADS)
• NASA Microgravity Research Program
• Newtonian or Classical Physics
• Newtonian Gravity in Curved Space
• Newtonian Gravitation & the Laws of Kepler
• Newton's Law of Gravity
• Newton's Laws & Planetary Motion
• Newton's Three Laws of Motion
• Newtonian Mechanics
• NSSDC Astronomy & Astrophysics
• Nuclear Astrophysics Data
• Orbital Mechanics
• Orbital Motion
• Orbits in 2D
• Orbits in 3D
• Papers & Websites
• Principle of Equivalence
• Sci.Astro Astrophysics FAQs
• Sir Isaac Newton: The Universal Law of Gravitation
• Snap! Astrophysics
• Stefan-Boltzmann Law
• Strands
• Terrestrial & Celestial Motion
• Titius-Bode Law
• Titius-Bode Law: A Numbers Game
• Universal Motion
• Universe of Rules
• Using Kepler's Third Law Calculator
• Vectors: Velocities, Accelerations & Forces
• Yahoo! Astrophysics
• Top of Page

 Relativity

• Acceleration in One Dimension
• Albert Einstein & the Theories of Relativity
• Albert Einstein & the Theory of Relativity
• Can Special Relativity Handle Accelerations?
• Classic Einstein Train Scenario
• Dilation of Time
• Dummies Guide to Special Relativity
• Einstein's Theory of Relativity
• Einstein's Theory of Relativity
• Experimental Basis of Special Relativity
• General Relativity
• General Relativity
• General Relativity
• General Relativity
• General Relativity
• General Relativity Around the World
• General Relativity Characteristics
• General Relativity & Cosmology
• General Relativity & Cosmology for Undergraduates
• General Relativity Explanation
• General Relativity Tutorial Long Course
• General Relativity Tutorial Short Course
• General Relativity: A Very Wierd World
• General Theory
• General Theory of Relativity
• Geometry of Spacetime
• Images of the Fourth Dimension
• Introduction to Differential Geometry & General Relativity
• It's All Relative Quiz
• Lecture Notes on General Relativity
• Length Contraction
• Light Cone: An Illuminating Introduction to Relativity
• Lorentz Contraction
• Mass Increase
• Michelson-Morley Experiment
• Motion, Space & Time
• Nature of Space & Time
• On the Theory of Relativity
• Orbits in Strongly Curved Spacetime
• Plausibility of Time Travel
• Postulates of Special Relativity
• Relatively Simple!
• Relativity
• Relativity
• Relativity
• Relativity Animations
• Relativity FAQ
• Relativity Movies
• Relativity & the Separation Formula
• Relativity & Spacetime
• Relativity Tutorial
• Rigid Rotating Disk in Relativity
• Solving Einstein's Equations in Three Dimensions
• Spacetime 101
• Spacetime Mediation of Quantum Interactions
• Special Relativity
• Special Relativity
• Special Relativity
• Special Relativity
• Special Relativity
• Special Relativity
• Special Relativity Characteristics
• Special Relativity FAQ
• Special Relativity Launcher
• Special Relativity Questions
• Special Relativity & Supernovae
• Special Relativity: What Time Is It?
• Special Theory of Relativity
• Special Theory of Relativity
• Theory: Special Relativity
• Time Dilation
• Time Travel in Flatland
• Twin Paradox
• Unaccelerated Twin Paradox
• What is Special Theory of Relativity?
• Yahoo! Relativity
• Top of Page

 Electromagnetic Spectrum & Light

• Aberration of Light
• All About Spectra
• Atomic Hydrogen Spectra: Tools for Probing Galaxies
• Blackbody Radiation
• Coulors & Spectra
• Doppler Effect
• Doppler Shift
• Electromagnetic Radiation
• Electromagnetic Spectrum
• Electromagnetic Waves
• Emission & Absorption by Atoms
• Gamma Ray Astronomy
• Gamma Ray Detectors
• Information from Space
• Interaction of Matter & Light
• Inverse Square Law
• Inverse Square Law
• Light
• Light & Electromagnetic Radiation
• Light & Color
• Light Curves, Spectra, & Images
• Light Laws
• Light & the Electromagnetic Spectrum
• Light & Matter I
• Light Tour
• Matter & the Study of Radiation
• Multiwavelength Astronomy
• Nature of Light
• Photon Nature of Light
• Spectra
• Spectra & What Scientists Can Learn from Them
• Spectral Analysis
• Spectroscopy Leaflet
• Star Light Star Bright
• Ultraviolet Light
• What is Spectroscopy?
• X-Ray Astronomy
• X-Ray Astronomy
• X-ray Detectors
• X-ray Generation
• Why is the Sky Blue?
• Why the Sky is Blue
• Yahoo! Gamma Ray Observation
• Yale Light & Spectra Links
• Top of Page

 Radio Astronomy

• AstroCapella Cosmic Radio Show
• Atlas of Double Radiosource Associated with Galactic Nucleus (DRAGN)
• Cambridge Low Frequency Synthesis Telescope (CLFST)
• Committee on Radio Astronomy Frequencies
• Greenbank Telescope
• Infrared Astronomy
• Infrared Processing & Analysis Center (IPAC)
• Introduction to Radio Astronomy
• Large Millimeter Telescope
• Millimeter-Wave Reflectometry
• National Radio Astronomy Observatory (NRAO)
• Princeton Pulsar Group
• Project Serendip
• Pulsars
• Smart Antenna Systems
• Snap! Radioastronomy
• Submillimeter Telescope General Information
• Very Large Array (VLA)
• Web Window to the Invisible Universe
• Yahoo! Radio Astronomy
• Top of Page

 Archaeoastronomy

• Aboriginal Star Knowledge
• Adventures in Archaeoastronomy
• Archaeoastronomy
• Archaeoastronomy Slides
• Archaeoastronomy at Mounds State Park
• Archaoegeodesy
• Astroarchaeology
• Brief Introduction to Archaeoastronomy
• Center for Archaeoastronomy
• Central Texas Sun Dagger
• Chaco Canyon
• Clive Ruggle's Archaeoastronomy Images
• Earth Mysteries: Archaeoastronomy at Stonehenge
• Easter Island Tablets
• Ekonk Hill Petroglyph
• Great Pyramid of Giza
• History of Astronomy: Archaeoastronomy, Ancient Astronomy & Ethnoastronomy
• Introduction to Archaeoastronomy
• Places of Peace & Power
• Sacred Sites
• Stone Wheels & Dawn Stars Rising
• Stonehenge
• Stonehenge: Eclipse Computer?
• Stonehenge & the Rings of Rock
• Stonehenge: The Truth
• Stonehenge, Wiltshire
• Sunwheel
• Top of Page

 Ancient Astronomy History

• Ancient Astronomy
• Ancient Astronomy
• Ancient Egyptian Mythology
• Annotated Timeline
• Àryabhatíya of Àryabhata
• Astronomy in Babylon
• Astronomy in Gotland
• Astronomy History Resources
• Astronomy & Islam
• Astronomy in Japan
• Aztec Creation Story
• Babylonian Planetary Theory & the Heliocentric Concept
• Bulfinch's Mythology
• Early Greek Scientists Struggle to Explain How the Heavens Move
• Greek Accomplishments
• Greek Astronomy
• Greek Cosmology
• History of Astronomy
• History of Astronomy
• History of Astronomy
• History of Astronomy in Ancient India
• How the Greeks Used Geometry to Understand the Stars
• How the Shaman Stole the Moon
• Hypatia of Alexandria
• Japanese Astronomy
• Jewish Astronomy
• Lords of the Earth
• Mayan Cosmogenesis
• Meteors & the Native Americans
• Mid-Atlantic Geomancy
• Mythscape
• Nativity Pages
• Stars of Bethlehem
• Star of Wonder
• Timeline
• Workings of the Universe
• Top of Page

 Modern Astronomy History

• Astronomy: A Brief History
• Astronomy History
• Astronomy: The Universe Unfolds
• Brief History of Astronomy
• Copernican System
• Cosmos from the Earth
• Development of Modern Astrophysics
• Einstein's Papers
• Fall of the Leaning Tower
• History of Astronomy & Astrophysics
• History of Astronomy: Museums, Memorials, Historical Places, & Exhibits
• History of Astronomy & Space Science
• History of the Discovery of Deep Sky Objects
• History of the Messier Catalog
• History of the Hubble Space Telescope
• Humorous History of Astronomy
• Missed Planets
• Museo della Specola
• NASA Astronaut Biographies
• NASA History Office
• Physics of Aristotle Versus Physics of Galileo
• Shapley-Curtis Debate in 1920
• Space Quotes
• This Month in the History of Astronomy
• Yahoo! Astronomy History
• Yale History of Astronomy Links
• Top of Page

 Astronomers

• Albert Einstein: Image & Impact
• Albert Einstein Online
• Angelo Secchi
• Biographies
• Caroline Herschel
• Catalog of the Scientific Community in the 16th & 17th Centuries
• Claudius Ptolemy
• Christopher Clavius
• Early Greek Philosophers
• Eratosthenes
• Eratosthenes Measures the Earth
• Eugene M. Shoemaker: A Tribute
• Friedrich Wilhelm Herschel
• Galileo Galilei
• Galileo Project
• Galileo: The Telescope & the Laws of Dynamics
• Galileo Timeline
• Giordano Bruno
• Henry Norris Russell
• Hipparchus
• Isaac Newton
• Isaac Newton
• Isaac Newton
• Isaac Newton Resources
• Johannes Kepler
• Johannes Kepler
• Johannes Kepler
• Johannes Kepler: The Laws of Planetary Motion
• Karoline Herschel
• Later Greek Astronomers & Scientists
• Newton's Cosmological Queries
• Nicolas Copernicus
• Nicolaus Copernicus
• NOVA: Einstein Revealed
• Observations of Tycho Brahe
• Paolo Antonio Foscarini
• People in Astronomy
• People in the History of Astronomy
• Ptolemy
• Pickering's Pursuit
• Sir Isaac Newton & the Unification of Physics & Astronomy
• Snap! Astronauts
• Snap! Prominent People
• Stephen Hawking Pages
• Stephen Hawking's Website
• Timeline of Albert Einstein's Life
• Tycho Brahe
• Tycho Brahe
• Women in Astronomy
• Yahoo! Astronomers
• Top of Page

 Rocketry & Propulsion

• Basics of Space Flight
• Beginning of Space Flight
• Engineers Before World War II
• Post War Feats & Flights
• Pre-Astronauts, Rocket Pioneers & NASA Administrators
• Rockets & Rocket Science
• Sergei Pavlovich Korolev
• Werner von Braun Paper
• Top of Page

 Space Exploration

• 30 Years After One Giant Leap
• AerospaceGuide.com
• Americans Respond: Project Mercury
• Apollo 11 25th Anniversary
• Apollo 11 30th Anniversary
• Apollo 13 Accident
• Apollo: The Hope of All Men
• Apollo Online
• Apollo-Soyuz Test Project
• Astronaut Challenge
• BeppoSax Mission
• BOOMERANG: Balloon Observations of Millimetric Extragalactic Radiation & Geophysics
• Chronology of Lunar & Planetary Exploration
• Chronology of Solar System Discovery
• Conquest of Space
• Cosmic Ray, Gamma Ray & Neutrino Experiments
• Deep Space 1
• Educator's Guide to Johnson Space Center
• Educator's Guide to Robotic Spacecraft
• Encyclopedia Astronautica
• ESA Space Science Missions
• European Space Agency
• Exploration Continues
• Gravity Probe B
• High Energy Solar Spectroscopic Imager
• High Energy Transient Explorer
• History of Space Exploration
• Imager for Magnetopause-to-Aurora Global Exploration (IMAGE)
• Kennedy Space Center
• Military in Space
• NASA Balloon Program
• NASA Earth Science & Solar System Exploration Division
• NASA Goddard Space Flight Center
• NASA Missions
• NASA Network Control Center
• NASA Skywatch
• NASA Space Science Missions
• NASA Ulysses Operations
• Next Generation: Gemini & Voskhod
• Other Space Programs
• Projects to Employ Resources of the Moon and Asteroids Near Earth in the Near Term (PERMANENT)
• Piloting Astronauts
• Pioneer Missions
• Planetary Missions
• Planetary Science Spacecraft
• Remote Sensing
• Russian Space
• Russian Space Programs
• Shuttle Radar Topography
• Snap! Space Exploration
• Spacecraft Models
• Space Exploration Programs
• Spaceflight & Spacecraft
• Space History
• Space Industrial Arts
• Space Interferometry Mission
• Space Probes
• Space Shuttle
• Space Shuttle
• Space Shuttle Press Kit
• Spacework in Progress
• Ulysses
• VentureStar
• Vostok & Mercury
• Voyager 1 & 2
• Voyager: The Grandest Tour
• Voyager Project
• Why Study Space?
• X-33 History
• X Prize Foundation
• Yahoo! Spacecraft
• Yahoo! Spaceshuttle
• Yohkoh & the Sun
• Top of Page

 Space Colonization

• Human Body in Outer Space
• Human Exploration & Development of Space
• Human Spaceflight: The Soviets
• International Space Station
• International Space Treaties
• NASA Human Space Flight
• NOVA: Terror in Space
• Snap! Colonization
• Space Environments & Effects
• Space Law
• Space Organizations
• Space Policy
• Space Station
• Stationed in the Stars
• Where is the International Space Station?
• Top of Page

 Interstellar Travel

• Future of Space Programs
• Interstellar Space Rocket Travel
• Interstellar Travel
• NASA Voyager
• Proposed Methods of Interstellar Travel
• Warp Drive When?
• Top of Page

 Observatories

• Arecibo Observatory
• Australia Telescope National Facility
• Big Bear Solar Observatory
• Bradford Robotic Space Telescope
• California Extremely Large Telescope (CELT)
• Chandra X-Ray
• COBE Satellite
• Compton Gamma Ray Observatory (CGRO)
• Dark Matter Telescope (DMT)
• European Southern Observatory
• Galileo to Hubble
• Global Network of Astronomical Telescopes
• Gran Telescopio Canarias (GTC)
• Griffith Observatory
• Hubble History
• Hubble Space Telescope
• Hubble Space Telescope 10th Anniversary
• Infrared Spacial Interferometer
• Jodrell Bank
• Keck Observatory
• Kitt Peak Observing Information
• Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST)
• Large Binocular Telescope (LBT)
• Lick Observatory
• Lowell Observatory
• Mauna Kea Observatories
• Mirlin JPL Deep-Well Infrared Camera
• M.I.T. Haystack Observatory
• McDonald Observatory
• Mount Wilson Observatory
• NASA Next Generation Space Telescope
• National Geographic Star Journey Hubble Space Telescope
• National Optical Astronomy Observatories (NOAO)
• National Solar Observatory
• Non-Optical Telescopes
• Observatories
• Observatories & Telescopes
• Observatories of the World
• Observatory Latitudes & Longitudes
• Optical Astronomy
• Overwhelmingly Large Telescope (OWL)
• Palomar Observatory
• Robinson Lunar Observatory
• Smithsonian Astrophysical Observatory
• Snap! Observatories & Telescopes
• Solar & Heliospheric Observatory
• Southern African Large Telescope (SALT)
• Space InfraRed Telescope Facility
• Steward Observatory Mirror Lab
• Swedish 50 m Optical Telescope (XLT)
• Tale of Three Telescopes Part I.
• Tale of Three Telescopes Part II.
• United States Naval Observatory
• Universe According to Hubble
• Visible & Infrared Survey Telescope for Astronomy (VISTA)
• Yahoo! Observatories
• Yerkes Observatory
• Top of Page

 Planetaria & Astronomy Museums

• Abrams Planetarium
• Adler Planetarium & Astronomy Museum
• Arizona Science Center
• Astronaut Memorial Planetarium
• Bishop Museum Planetarium
• Brahe Planetarium
• Calgary Science Center
• Cernan Earth & Space Center
• Evans & Sutherland
• Fiske Planetarium
• Flandrau Science Center
• Fleet Space Theater
• Fleischmann Planetarium
• Hansen Planetarium
• Hayden Planetarium
• Holt Planetarium
• International Planetarium Society
• Isaac Newton Museum
• Melbourne Planetarium
• Montréal Planetarium
• Morehead Planetarium
• Mystic Seaport Planetarium
• National Air & Space Museum
• Northern Lights Planetarium
• Other Planetarium Sites of Interest
• Snap! Museums & Planetariums
• So You Want to Build a Planetarium
• Strasenburgh Planetarium
• Yahoo! Planetaria
• Yahoo! Space Museums
• Zeiss Star Projector
• Top of Page