The Nine Planets: Earth
General information, some statistical data and links.

  • Earth Terra, Sol III Earth is the third planet from the Sun and the fifth largest: : 149, 600, 000 km (1.00 ) from Sun : 12, 756.3 km : 5.972e24 kg Amazing pictures of Earth from space combine useful science and artistic beauty

  • Kids often ask me which is my favorite planet

  • Earth is the only planet whose English name does not derive from Greek/Roman mythology

  • There are, of course, hundreds of other names for the planet in

  • It was not until the time of (the sixteenth century) that it was understood that the Earth is just another planet

  • Nevertheless it was not until the twentieth century that we had maps of the entire planet

  • Pictures of the planet taken from space are of considerable importance; for example, they are an enormous help in weather prediction and especially in tracking and predicting hurricanes

  • Note, however, that our knowledge of planetary interiors is mostly theoretical even for the Earth

  • Unlike the other planets, which float around independently on top of the hot mantle below

  • Earth is the only planet on which water can exist in liquid form on the surface (though there may be liquid ethane or methane on surface and liquid water beneath the surface of )

    Welcome to the Planets
    A collection of many of the best images from NASA's planetary exploration.

  • This is a collection of many of the best images from NASA's planetary exploration program

  • The collection has been extracted from the interactive program 'Welcome to the Planets' which was distributed on the Planetary Data System Educational CD-ROM Version 1.5 in December 1995

  • Please note: This collection replaces the former on-line version of Welcome to the Planets

    Your Weight On Other Worlds
    From the Exploratorium, an interactive calculator that will determine a person's
    weight on another planet.

  • You can click on the images of the planets to get more information about them from Bill Arnett's incredible web site

  • The Planets MERCURY Your weight is VENUS Your weight is THE MOON Your weight is MARS Your weight is JUPITER Your weight is SATURN Your weight is URANUS Your weight is NEPTUNE Your weight is PLUTO Your weight is The Moons of Jupiter IO Your weight is EUROPA Your weight is GANYMEDE Your weight is CALLISTO Your weight is A Few Different Types of Stars (better land at night to avoid burning your feet!) THE SUN Your weight is A WHITE DWARF Your weight is A NEUTRON STAR Your weight is Mass and Weight Before we get into the subject of gravity and how it acts, it's important to understand the difference between weight and mass

  • This force of attraction between you and the Earth (or any other planet) is called your weight

  • First, it depends on your mass and the mass of the planet you are standing on

  • If the planet you are standing on is twice as massive, gravity also pulls on you twice as hard

  • On the other hand, the farther you are from the center of the planet, the weaker the pull between the planet and your body

    Complete guide regarding general and statistical data about this planet and Charon.
    Includes pictures and links to other related sites. By Rosanna Hamilton.

  • Table of Contents Pluto Introduction Pluto's Moons Pluto Science Other Resources Although Pluto was discovered in 1930, limited information on the distant planet delayed a realistic understanding of its characteristics

  • Today Pluto remains the only planet that has not been visited by a spacecraft, yet an increasing amount of information is unfolding about this peculiar planet

  • The uniqueness of Pluto's orbit, rotational relationship with its satellite, spin axis, and light variations all give the planet a certain appeal

  • Pluto is usually farther from the than any of the nine planets; however, due to the eccentricity of its orbit, it is closer than for 20 years out of its 249 year orbit

  • Although it is common for a satellite to travel in a with its planet, Pluto is the only planet to rotate synchronously with the orbit of its satellite

  • Unlike most planets, but similar to, Pluto rotates with its poles almost in its orbital plane

  • There is a thin atmosphere that freezes and falls to the surface as the planet moves away from the Sun

  • NASA plans to launch a spacecraft, the Pluto Express, in 2001 that will allow scientists to study the planet before its atmosphere freezes


    Photo by

    Views of the Solar System, Calvin J. Hamilton.

  • - Albert Einstein Table of Contents Uranus Introduction Satellites of Uranus Uranus Science Other Resources Uranus is the seventh planet from the Sun and is the third largest in the solar system

  • Winds at mid-latitudes on Uranus blow in the direction of the planet's rotation

  • Its unusual position is thought to be the result of a collision with a planet-sized body early in the solar system's history

  • found that one of the most striking influences of this sideways position is its effect on the tail of the magnetic field, which is itself tilted 60 degrees from the planet's axis of rotation

  • The was shown to be twisted by the planet's rotation into a long corkscrew shape behind the planet

  • The magnetic fields of Earth and other planets are believed to arise from electrical currents produced in their molten cores

  • Hamilton) The Interior of Uranus Our knowledge of the internal structure of Uranus is inferred from the planet's radius, mass, period of rotation, the shape of its gravitational field and the behavior of hydrogen, helium, and water at high pressure

  • These elements are under high temperatures and pressures deep within the planet

    Mars - Astronomy for Kids
    Provides details about its location, its visibility, size and number of satellites.

  • ....and supervised adults Mars Mars The Red Planet Mars Facts Distance from Sun Approximately 137 million miles Number of Moons Two Diameter 4070 miles Length of Day 24 Earth hours Length of Year 687 Earth days Name Comes from the Roman god of war

  • Modern science, using information from both past and current spacecraft, paints a more fascinating picture of the Red Planet than even the movie industry has been able to dream up

  • Mars is the only planet where the average backyard astronomer can actually see the seasons change

  • Amateurs using a moderately sized telescope in good viewing conditions, can actually see the polar ice caps on Mars get bigger and smaller as the planet goes through summer and winter

  • A Frigid Desert When early astronomers started looking at Mars through their primitive telescopes, they could see that the planet seemed to change colors as time passed, with dark areas on the surface of the planet growing and then shrinking as time passed

  • Also, there appeared to be dark lines on the surface of the planet that some overenthusiastic observers thought were canals made by intelligent life forms on the planet

    Mercury - Astronomy for Kids
    Provides details related to location, visibility, size, origin of its name and surface.

  • ....and supervised adults Mercury Mercury Mercury - the Winged Messenger Mercury Facts Distance from Sun Varies between 27 million miles and 41 million miles Number of Moons None Diameter 3, 000 miles Length of Day 176 Earth days Length of Year 88 Earth days Named for Roman god of commerce Visited by Mariner 10 Tiny Mercury is the second smallest planet in our solar system, only Pluto is smaller

  • As a matter of fact, there are two moons in the solar system that are larger than this planet! Jupiter's moon Ganymede and Saturn's moon Titan are both larger than the closest planet to the Sun

  • In addition, the surface temperature on Mercury varies widely, with the side of the planet facing the Sun having an average temperature of over 650 degrees Fahrenheit, while the 'dark' side of the planet has an average temperature less than 270 degrees below zero Fahrenheit

  • Even though Mercury is one of our closest planetary neighbors, we don't know a whole lot about it

  • Since the planet is so close to the Sun, it's not safe to have the Hubble Space Telescope take pictures of it

  • The Closest Planet to the Sun A Battered Planet battered surface

    When Is a Planet Not a Planet? - 98.02
    Articles discusses the debate whether Pluto should be included among the planets.
    [Atlantic Monthly]

  • Benefits

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    BBC - Science & Nature - Space - Solar System
    3D tour including videos with audio and text information on the Sun and the bodies
    orbiting around it. (Shockwave and Realplayer required)

  • 10 August 2006 In : Like this page? You are here: > > > Solar System SOLAR SYSTEM · Your travel guide to the Solar System · DEFINITION The Solar System is made up of the Sun, the planets, their moons, asteroids and comets REASONS TO VISIT Experience an amazing variety of worlds Run the gauntlet of floating rocks and boulders in the belt Encounter the icy that wander through the outer Solar System Solar System Jigsaw Can you WHAT TO SEE The Sun is a star that lives at the centre of the Solar System

  • Its huge gravity holds the planets in place

  • The planets all revolve around the Sun

  • Moons rotate around their parent planet

  • Earth has one moon, but some planets have over 30

  • They are the remnants from early planets that collided and were torn apart

  • Over time, the gas cooled and clumped together to form large bodies called 'protoplanets'

  • People of the ancient world observed the movements of the planets and thought they were wandering stars

  • This is why the Greeks gave them the name planetes or 'wanderers'

  • TRAVEL INFORMATION From the Earth You can sometimes spot the planets in the night sky from Earth

    Students for the Exploration and Development of Space (SEDS) Home
    An international organization provides learning activities, information and news
    concerning space and its exploration. Includes photographs taken from ...

  • Check out his mini-blog to all SEDS members at the below link! Posted on Wednesday, March 15, 2006 @ 2:58am by Yuri's Night 2006- World Space Party! Join the biggest space party on the planet this April 12th! Register a party today in YOUR HOMETOWN at

  • Posted on Thursday, August 31, 2006 @ 2:35pm by IAU defines 'Planet' The International Astronomical Union is currently in Prague debating what is the definition of a 'Planet'

  • This draft and vote will have major implications for the education of the general public, and the transitory phase from the classical 9 planet definition to possibly a 12+ planet model

  • Posted on Tuesday, July 4, 2006 @ 11:55am by Planetary Society Opens Optical SETI Telescope After 20 years of listening for signs of life elsewhere in the universe, The Planetary Society is now ready to watch the skies

    Planet Mercury - Overview and Pictures
    General overview of the planet Mercury with facts and pictures.

  • Planet Mercury - Overview and Pictures Parse error : parse error, unexpected $, expecting ')' in /home/fhlinux199/s/ on line 505

    Astronomy For Kids - Pluto -
    Provides details about its name and its origin in Greek mythology, facts related
    to gravity on the planet and its moon.

  • What Would You Like To Learn About? Learn About The Planets Learn About The Moons of Our Solar System Learn About Astroids And Comets (For Printing) KidsKnowIt Network Pluto means: In astronomy mythology, Pluto was thought to be the god to whom all men must eventually go

  • The Dwarf Planet: Pluto is smaller than 7 of the moons in the Solar System

  • Because it is so small many scientists don't consider it a planet at all

  • On August 24th, 2006 Pluto's status was officially changed from planet to dwarf planet

  • For decades children have been taught that there are nine planets in the Solar System

  • However, with this change, there are now only eight planets

  • Because we have never sent probes to this planet we know very little about it

  • The Earth and it's moon Luna are sometimes considered double planets


    ORRERY: Saturn - ringed beauty
    General information about the planet and its moons presented in a popular language.

  • Saturn - ringed beauty | Saturn | Saturn is the sixth planet from the Sun

  • There are 22 moons orbiting the planet, 4 of which were discovered in summer 2000

  • is the largest (diameter 5, 150km), and is the only planetary satellite known to have an atmosphere, mainly nitrogen

  • Day & Night Just like all the other planets, Saturn is visible because it reflects the 's light

  • The left side of the planet is in shade: night

  • Ringed Beauty The planet has an extensive system of rings, composed of icy particles ranging in size from pebbles to beach balls

  • Exploring the Solar System If you'd like to explore Saturn further, you could do much worse than check out Giles Sparrow's book! Join him ( | ) on an imaginary tour of this wondrous planet

  • Under Study After a brief fly-pass by Pioneer 11 in 1979, Voyagers 1 and 2 sent back much important information about the planet, its satellites and rings during their encounters in 1980 and 1981

  • A Typical Giant The composition of the planet is very similar to that of, with a silicate core surrounded by liquid hydrogen, and a deep gaseous hydrogen atmosphere

    Zelda Planet - ...And Zelda for all!
    News, characters, fan art, images, message boards, and movies.

  • Come and check it out! Just some new artwork By on 09/04/2006 Fan Artwork maskofmemories - Nick Shelton - | Lack of updates By on 08/10/2006 I apologise to everyone who has sent in an email to Zelda Planet in the past few weeks

  • | Happy Birthday! By on 07/09/2006 Today, Zelda Planet celebrates it's 7th birthday online

    Rugby news, results, fixtures and features from
    Tournament history, a message board, fixtures, results and teams involved in the
    Barcelona 2002 WRWC.

    Remember the Maine
    Detailed account of the sinking of the Maine, the press reaction in the US and
    the war which followed.

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    Is Pluto a giant comet?
    Discusses related discoveries and excerpts.

  • Well, then, is Pluto a planet? Yes, it appears to be a planet

  • But it is reasonable to qualify that by saying that Pluto is not a major planet because it is simply too small to be a major planet (though the pride of many American astronomers causes them to continue to fight politically for Pluto to be called 'one of the nine major planets')

  • It is a planet of some sort, and many planetary scientists in the last couple of decades of the 20th century began speaking of Pluto as a 'planetesimal' -- and no longer as a 'major planet' -- in the astronomical literature (note the several dozen authors in the documented list below)

  • There is no need to have an 'edict' saying that Pluto is not the ninth major planet, as astronomy doesn't really work that way, and the field is gradually but steadily moving toward an eventual universal acceptance of a new picture of the solar system that places Pluto in a different (but still significant) light

  • And, yes, it might be that we will want to consider placing Pluto in different categories, such as (minor) planet and comet

  • Such 'dual status' already exists for some comets and minor planets, which are given formal numbers and names in both kinds of catalogues - Sharing knowledge, learning from others
    Offers information for motherboards, history of computers and pc problems.
    Includes tutorials for Adobe Photoshop.

  • Ne (continued...) | Posted by on Thursday, August 24, 2006 (11:46 AM) From Leading astronomers declared Thursday that Pluto is no longer a planet under historic new guidelines that downsize the solar system from nine planets to eight.After a tumultuous week of clashing over the essence of the cosmos, the International Astronomical Union stripped Pluto of the planetary status it has held since its discovery in 1930

  • The new definition of what is — and isn't — a planet fills a centuries-old black hole for scientists who have labored since Copernicus without one.Although astronomers applauded after the vote, Jocelyn Bell Burnell — a specialist in neutron stars from Northern Ireland who oversaw the proceedings — urged those who might be "quite disappointed" to look on the bright side."It could be argued that we are creating an umbrella called 'planet' under which the dwarf planets exist, (continued...) | Posted by on Saturday, August 12, 2006 (12:42 AM) From DPReview: Nikon has today (August 9) put the end to the speculation and announced the new ten megapixel D80 digital SLR

    Boing Boing: A Directory of Wonderful Things
    A directory of wonderful things.

    Gravity Rules: The Nature of Planethood
    Article discussing possible definitions that qualify objects, such as Pluto and
    Sedna in the Kuiper Belt, as being planets or not.

  • Get Your Free Space Newsletter SubscribeUnsubscribe Search All Of Our Sites In One Search SpaceDaily - SpaceWar - TerraDaily Gravity Rules: The Nature and Meaning of Planethood by S

  • Alan Stern Boulder - Mar 22, 2004 I am a planetary scientist, so you won't find it surprising that this past Monday evening, March 15th, the dinner table conversation at our home eventually turned to the discovery of the largest ever Kuiper Belt Object, Sedna (2003 VB12)

  • When I remarked that I was amused by the fact that some astronomers don't consider Sedna a planet, our teenage daughter Kate joined in-agreeing that Sedna shouldn't be classified a planet

  • 'Dad, if Sedna is a planet, then Ceres is too, and there are probably lots and lots more things this big that we haven't discovered

  • We can't have so many planets that you can't name them all!' Flawed, as it was, Kate's logic about exactly what should and should not qualify as a planet is about as good what I have heard lately from some professional astronomers

  • Despite that, however, some of my brethren think that dwarf planetary bodies like Sedna shouldn't be termed planets


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