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How to spot an alien Earth

Where else might life exist in our universe? Read astrobiologist Lewis Dartnell's guide to finding our planet's twin.

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Earth sunlight calculator

Description:: Allows a view of the Earth showing where night and day is. Users can alter the view of the Earth to show different countries.
Keywords:: day, earth, interactive, multimedia, night, rotation,

Hits:308
Rated 1 out of 5 stars

The Earth

Description:: Straightforward, easy to understand answers to 13 frequently asked questions about the planet Earth. This site is plain, but coherent and factual presentation. (All distances and speeds quote miles & mph)
Keywords:: astronomy, atmosphere, comet, earth, gravity, life, spin, sunlight, temperature,

Hits:233
Rated 1 out of 5 stars

6 billion Human Beings

Description:: An extensive interactive site on population change - requires Shockwave plug-in
Keywords:: earth, multimedia, population, world,

Hits:167
Rated 5 out of 5 stars

Constants - A to B

Description:: All the constants are alphabetically ordered (A to B). Some have links to pages with more information on that constant such as how it is defined and who derived it - look for the magnifying glass icon.
Keywords:: absolute, acceleration, acre, air, alladi-grinstead, angstrom, annee-lumiere, apery, apothecaries, archimedes, ast, cold, constant, critical, density, earth, entropy, fall, free, ounce, temperature, viscosity,

Hits:329
Rated 1 out of 5 stars

Cassini Huygen - Nasa

Description:: Nasa's webpage for children dealing with the Cassini space probe to Saturn and Titan with pictures to draw, models to build and links to other associated topics. The links soon lead to far more complicated material.
Keywords:: cassini, earth, experiment, huygen, mission, model, nasa, picture, planet, probe, saturn, space, titan,

Hits:209
Rated 1 out of 5 stars

Space Shuttle Photographs

Description:: A collection of photos taken by space shuttle astronauts using both conventional and radar imagery, maintained by the Center for Earth and Planetary Studies. There are links to other sources of Earth observation photographs, and also a 'Geography from Spa
Keywords:: earth, photograph,

Hits:339
Rated 1 out of 5 stars

Earth and Sky

Description:: This site accompanies a Canadian radio show but has plenty of material to be a stand alone site.
Keywords:: astronomy, earth, question, science, sky,

Hits:231
Rated 1 out of 5 stars

About Foucault Pendulums

Description:: Find out everything from how Foucault invented the pendulum to why they prove the earth rotates. Very well presented.
Keywords:: aristarchus, copernicus, earth, foucault, inertia, pendulum, rotate, rotation, spin,

Hits:251
Rated 5 out of 5 stars

Seasons and Solstices

Description:: An internet field trip with links to many pages relevant to the solstices and change of seasons. The "internet field trip" sites are very good - well thought out contextual links.
Keywords:: earth, equinox, mayan, multimedia, rotation, seasons, solstice,

Hits:169
Rated 1 out of 5 stars

Jet Propulsion Laboratory

Description:: Jet Propulsion Labs front page with links to other parts of the site giving up to date news of various projects.
Keywords:: earth, galaxy, jet, mars, mission, nasa, rover, solar, space, star, system, universe,

Hits:387
Rated 1 out of 5 stars

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