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Astronomers have, for the first time, spotted a planet that is considered to be in the "Goldilocks zone," meaning that its environment is just right to sustain life: not too hot, not too cold. Scientists approximate that...
The Two Micron All Sky Survey at IPAC website provides an image gallery of the solar system's objects, Jupiter's moons, H II regions, star formation regions, and reflection nebulae, open star clusters, globular star...
This NASA Image of the Day is the first image of the Earth and moon in a single photograph. The image was captured 7.25 million miles from Earth by Voyager 1 in 1977. More information about the photograph and a link to...
This case study uses the example of Pluto: how do we determine what a planet is? The lesson compares orbital parameters like semi-major axis, orbital period and orbital resonance of different planets. The material would...
Scientists have been looking for extra-solar planets for decades, but only recently, with better equipment and improved techniques, have they finally unveiled new and unusual planets. Since 1995, over 155 planets have...
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