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Articles − Astronomy and nature

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Saros cycle and Exeligmos
Eclipses of the Moon and Sun are synchronized
in a Saros cycle and even better in a cycle
of three Saros called a Exeligmos...
Chariklo asteroid (10199) and its 2 ringsRadioactivity of the Earth
Chariklo and its two
amazing rings...		Radioactivity
of the Earth...
Diversity of solar system objectsEscape velocity to small objects to the balck holes
Tourist travel
in the solar system...		Escape velocity...
Dark nebulasHubble constant
Dark nebulas...
 		Hubble constant and
expansion...
 
Frost line or ice line or snow line in the solar systemAberration of light
Frost line
in the solar system...		Effects of aberration
of light...
Cluster of galaxies El Gordoénergie noire
The heavier cluster
of galaxies, El Gordo... 		The dark energy
is necessary...
atomic or electronic orbitals
The image of the atom or the first electronic orbital
of the hydrogen atom depending on the energy
of the electron...
Composition of interstellar dustsynchronous and geostationary orbit
Composition of
interstellar dust... 		How to calculate
synchronous orbit?
 
Living on MarsGravitational waves BICEP2
Living on Mars...
 		Gravitational waves...
 
See the exoplanetsKepler-186 system
Turn off the stars
and see the exoplanets...		The habitable zone
of Kepler-186...
Beyond our senses, the great scientific revolutionsWhat is a Cepheid? - RS Puppis
Beyond our senses...
 		Cepheids, true
standard candles...
Einstein ring and Einstein crossFree flight into space
Einstein ring and
Einstein cross...		With or without horizon,
where is the space station?
geostationary satellitesRoche limit
Where is the
geostationary orbit?		Roche limit or limit
not to exceed...
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