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Astronomy page 5
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Radioactivity, natural and artificial
Coronal mass ejections (CME)
Fractals objects
Water on the planet, an element extraterrestrial
Witch Head Nebula or IC 2118
ISS in low Earth orbit at 415 km altitude
Lagrange points, L1 L2 L3 L4 L5
And it turns majestically
The observable universe, a notion not intuitive
The periodic passage of comets
The habitable zones of stars or ecosphere
Toumai our ancestor, old 7 million years
Where does the water of the planet Earth?
Faraday reasoned like Einstein
Another image of the universe, space and time together, the undulations of gravity travel
Sustainable development, the living observe us
500 stars of the Pleiades
Superb annular eclipse January 15, 2010
Obliquity cause the seasons
If the abyssal plains are at 5000 m depth, large oceanic trenches dive even deeper under
Life evolves, sheltered from glaciations
Star or planet, brightness difference
Cosmic rays and mutation of species
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