Windows: Free Most popular Science Software downloads

Google Earth 5, download at http://earth.google.com

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Operating Systems: Windows Vista, Windows 2000, Windows XP. - (Historical imagery from around the globe. Google Earth lets you fly anywhere on Earth to view satellite imagery, maps, terrain, 3D buildings, from galaxies in outer space to the canyons of the ocean. You can explore rich geographical content, save your toured places, and share with others).

WorldWide Telescope, download at http://www.worldwidetelescope.org

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Operating Systems: Windows Vista, Windows XP. - (WorldWide Telescope (WWT) enables your computer to function as a virtual telescope, bringing together imagery from the best ground and space-based telescopes in the world. Experience narrated guided tours from astronomers and educators featuring interesting places in the sky).

Stellarium 0.10.2 download at http://www.stellarium.org

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Operating Systems: Windows 2003, Windows Vista, Windows 95, Windows Me, Windows 2000, Windows NT, Windows XP, Windows 98 . - (Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets, nebulas and others things like ground, landscape, atmosphere, etc).