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Articles − Astronomy and nature

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Toba caldera volcano
Large calderas of the world are formed after cataclysmic explosions of volcanoes. They can reach huge sizes...
calculating the distance of the horizonIn search of black holes
How to calculate the
distance to the horizon?		In search
of black holes...
the threat of supervolcanoesthe return of sunspots in 2010
The threat of
supervolcanoes...		Finally the return of
sunspots in 2010...
detailed image of Betelgeusematière manquante, énergie noire
The most detailed optical
image of Betelgeuse...		Non-baryonic
dark matter...
 
polar bears endangeredice cores tell us about the past...
Man will he the largest
animal on Earth?		Ice cores tell us
about the past...
Earth's atmosphere from spacearche anticrepuscular
Earth's atmosphere
from space...		Shadow of the Earth or
arch anticrepuscular...
Nuclear fission solar flare of February 15, 2011
Nuclear fusion, natural
energy source...		The most violent
solar eruptions...
fusion of galaxiesNuclear Power
Fusion galaxies
and black holes...		Nuclear energy or the
particularity of uranium...
vernal equinox and autumnalasteroid or comet (Itokawa and hartley 2)
The days and nights
equinox...		Asteroid or comet?
 
oil refinery
Global energy demand. At the dawn of a revolution, many people will be sacrificed for the survival of others...
neutron Starsthe supervolcanoes that changed life on Earth
Neutron star,
billions of tons cm3...		Supervolcanoes that
changed life on Earth...
DNA carrier of genetic informationeccentricity, obliquity and precession of the Earth
Story of the evolution
towards the living...		Variation of the
eccentricity of the Earth...
the global ecological footprintSpace debris
Global ecological
footprint...		Exponential increase
in space debris...
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