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"The International Space Station (ISS) orbits the earth at over 17,000 mph. See the world from the perspective of its astronauts and discover what's happening on the ground right now."

SpaceEngine - is a free space simulation software that lets you explore the universe in three dimensions, starting from planet Earth to the most distant galaxies. Areas of the known universe are represented using actual astronomical data, while regions uncharted by human astronomy are generated procedurally. Millions of galaxies, trillions of stars, countless planets!

"Astronomy is a natural science that is the study of celestial objects (such as moons, planets, stars, nebulae, and galaxies), the physics, chemistry, and evolution of such objects, and phenomena that originate outside the atmosphere of Earth, including supernovae explosions, gamma ray bursts, and cosmic background radiation."

"The Planetary Habitability Laboratory (PHL) is a research and education virtual laboratory dedicated to studies of the habitability of Earth, the Solar System, and exoplanets. Check the projects link for more details about the scientific projects. There are also links to scientific and educational materials, data and software tools related to planetary science and astrobiology that might be of interest to scientists, students, and the general public. The PHL is managed by the University of Puerto Rico at Arecibo."

Extreme Science is the place online to find the biggest, baddest, and the best in the world of extremes and learn about the science behind what makes each the most extreme example of its kind. Here you'll find world records in natural science, including earth science and the plant and animal kingdom. Not only will you find out who holds the records, but also key science concepts used to explain the story behind the record.

The Tau Zero Foundation is a volunteer group of scientists, engineers, entrepreneurs, and writers who have agreed to work together toward practical interstellar flight and to use this quest to teach you about science, technology, and our place in the universe. By posting the latest developments and unfinished advancements here, we give students the starting materials to begin their own discoveries. By showing both how daunting and incredible this challenge is, we hope to increase attention on protecting the habitability of Earth while planning journeys into the galaxy. By reaching for the stars we will create benefits every step of the way.

"The combined actions of thermodynamics and subsequent natural selection suggest that the genetic code we observe on the Earth today may have significant features in common with life throughout the cosmos."

Of the twenty amino acids used in proteins, ten were formed in Miller's atmospheric discharge experiments. The two other major proposed sources of prebiotic amino acid synthesis include formation in hydrothermal vents and delivery to Earth via meteorites. We combine observational and experimental data of amino acid frequencies formed by these diverse mechanisms and show that, regardless of the source, these ten early amino acids can be ranked in order of decreasing abundance in prebiotic contexts. This order can be predicted by thermodynamics. The relative abundances of the early amino acids were most likely reflected in the composition of the first proteins at the time the genetic code originated. The remaining amino acids were incorporated into proteins after pathways for their biochemical synthesis evolved. This is consistent with theories of the evolution of the genetic code by stepwise addition of new amino acids. These are hints that key aspects of early biochemistry may be universal.

Stuart Clark tells for the first time the full story behind Carrington's observations of a mysterious explosion on the surface of the Sun and how his brilliant insight-that the Sun's magnetism directly influences the Earth-helped to usher in the modern era of astronomy.

NASA's "Blue Marble" pictures of Earth show each month of the year 2004 to illustrate changes in snow cover and vegetation. Here, you can browse their maximum resolution of four pixels per km², as well as a slightly coarser night-lights map, enhanced by town names and national borders.

The new discovery indicates that the intensity of Earth's magnetic field is decreasing 10 times faster, leading some geophysicists to predict a reversal within a few thousand years.

The new discovery indicates that the intensity of Earth's magnetic field is decreasing 10 times faster, leading some geophysicists to predict a reversal within a few thousand years.

"Deep Space Map allows you to view celestial objects, including stars, constellations, galaxies and planets. The images seen here are identical to those found in version 1 that uses Google Earth API."

Planetary Habitability Laboratory (PHL) is a research and educational virtual laboratory dedicated to studies of the habitability of Earth, the Solar System, and extrasolar planets.

"The Planetary Habitability Laboratory (PHL) is a research and education laboratory dedicated to studies of the habitability of Earth, the Solar System, and exoplanets. Check the projects link for more details about the scientific projects. There are also links to scientific and educational materials, data and software tools related to planetary science and astrobiology that might be of interest to scientists, students, and the general public. The PHL is managed by the University of Puerto Rico at Arecibo."