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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."

Blogs I follow:

Theme by: Miguel
  1. unknownskywalker: Uranus in Infrared This image from Hubble Space Telescope’s NICMOS camera shows the planet, its rings and 10 of the moons, as well as an incredible band of storms raging across the cloud tops. The colors of the clouds indicate depth: blue comes from deeper clouds (methane in the atmosphere absorbs red light — the same reason deep water looks blue), yellow and gray from high clouds and haze, and the orange and reds from extremely high clouds. Also note the angle of the planet: it orbits the Sun tilted over “on its side”, so even from Earth we can trace the rings circling all the way around the planet. Source: Bad Astronomy

    unknownskywalker:

    Uranus in Infrared

    This image from Hubble Space Telescope’s NICMOS camera shows the planet, its rings and 10 of the moons, as well as an incredible band of storms raging across the cloud tops. The colors of the clouds indicate depth: blue comes from deeper clouds (methane in the atmosphere absorbs red light — the same reason deep water looks blue), yellow and gray from high clouds and haze, and the orange and reds from extremely high clouds. Also note the angle of the planet: it orbits the Sun tilted over “on its side”, so even from Earth we can trace the rings circling all the way around the planet.

    Source: Bad Astronomy

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