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"Atoms synthesized in the interiors of stars are commonly returned to the interstellar gas… The atoms returned are, naturally, those most readily made in the thermonuclear reactions in stellar interiors:…. All the elements of the Earth except hydrogen and some helium have been cooked by a kind of stellar alchemy billions of years ago in stars, some of which are today inconspicuous white dwarfs on the other side of the Milky Way Galaxy. The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff."

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Theme by: Miguel
  1. unknownskywalker: Rings on a Diagonal A pair of Saturn’s small satellites, Janus and Pandora, accompany the planet’s rings in this Cassini spacecraft image presenting the view in dramatic diagonal fashion. The rings are between the two moons. Janus, just above the center of the image, is most distant here. This view looks toward the northern, sunlit side of the rings from just above the ringplane, and toward the leading hemisphere of Pandora (81 km across) and the trailing hemisphere of Janus (179 km across). The image was taken in visible light on April 11, 2010, acquired at a distance of approximately 1.9 million kilometers from Janus and 1.8 million kilometers from Pandora. Scale is about 11 kilometers per pixel on both moons. Credit: NASA/JPL

    unknownskywalker:

    Rings on a Diagonal

    A pair of Saturn’s small satellites, Janus and Pandora, accompany the planet’s rings in this Cassini spacecraft image presenting the view in dramatic diagonal fashion.

    The rings are between the two moons. Janus, just above the center of the image, is most distant here. This view looks toward the northern, sunlit side of the rings from just above the ringplane, and toward the leading hemisphere of Pandora (81 km across) and the trailing hemisphere of Janus (179 km across).

    The image was taken in visible light on April 11, 2010, acquired at a distance of approximately 1.9 million kilometers from Janus and 1.8 million kilometers from Pandora. Scale is about 11 kilometers per pixel on both moons.

    Credit: NASA/JPL

    2. 32 Notes
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      (179 km across).The
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