The inert and the living
Are we alone?
Deep sea life
Explosion of life
Group of stars
Signs of the Zodiac
Astronomy for children
Sun, our star with huge explosions
The Sun is a variable star, that is a big ball of glowing gas that evolves over time.
Mercury the planet of iron
The proportion of iron in Mercury intrigue scientists.
Venus has a surface temperature of 470° C
Venus has a surface temperature of 470 ° C, the surface temperature is hot enough to melt lead.
Earth glides majestically on an ideal orbit
The Earth is a miraculous blue dot, an oasis of life amid the vastness of a universe without end.
The Moon is the result of a gigantic collision
A huge collision between the young Earth and an object the size of Mars would have ejected from the field around the Earth, which would eventually form the Moon we see today.
Mars comes in like a star looks red blood
Mars comes in like a star eyes blood red, this may be why it is called the god of war.
Phobos is doomed because its orbit is too close to Mars
Phobos is so close to Mars at 9380 km, it can not be seen above the horizon at any point on the surface of Mars.
Deimos, a primitive meteorite
The gravity of Deimos is so small that a man escape from the satellite jumping, which is equivalent to an escape velocity of 10m/s.
Ceres is the largest objects in the asteroid belt
Ceres is the largest and most massive object in the asteroid belt, its mass concentrated on its own third of the total mass of the asteroid belt.
Pallas est le deuxième plus grand objet de la ceinture d'astéroïdes
Pallas est le deuxième plus grand astéroïde de la ceinture principale d'astéroïdes. L’objet serait selon des chercheurs américains, une protoplanète.
Juno was the third asteroid discovered in the Solar System
Juno, the small planet of 240 km in diameter was completely disfigured by a collision.
Vesta is the only asteroid visible to the naked eye
The asteroid Vesta is the brightest of all, it is named after the Roman goddess of health. This is the only asteroid visible to the naked eye.
Jupiter, the protector of life on our planet
Jupiter has 318 times the mass of the Earth, has acted as a shield, protecting life on our planet.
Ganymede is the largest moon of Jupiter
Ganymede, larger than Mercury, was discovered by Galileo in 1610, this moon of Jupiter has a surface dotted with craters brilliant.
Saturn's rings, dislocation of a moon
Saturn rotates so fast in 10 hours that the centrifugal force forces the winds to blow parallel to the equator.
Titan, second largest satellite in the Solar System
Titan is the only satellite in the Solar System to possess a thick atmosphere of nitrogen and methane clouds, in which one can observe a very active weather.
Uranus is practically lying on its orbit
Uranus is composed of rock and ice, with only 15% hydrogen and some helium, while Jupiter and Saturn are composed almost entirely of hydrogen.
Titania is the largest moon of Uranus
Titania has a huge canyon, much larger than the Grand Canyon on Earth, the same order of magnitude as Valles Marineris on Mars.
The blue color of Neptune, by methane atmosphere
Neptune was not discovered by observation but with pencil and paper from the trajectory and characteristics of Uranus.
Triton, the largest satellite of Neptune
Triton is an external body, as captured by Neptune's orbit is retrograde, meaning that its direction is opposite to the rotation of Neptune.
Kuiper Belt and trans-Neptunian objects
The Kuiper Belt imagined in 1951 by Dutch astronomer Gerard Kuiper, extending from the orbit of Neptune (30 AU) to about 100 AU.
Pluto has three satellites, Charon, Nix and Hydra
Pluto is not just a ball of ice and rock but a dynamic world undergoing dramatic atmospheric changes.
Eris is an icy object of the Kuiper Belt
Eris is currently located at 97 AU from the Sun and rotates around it in 557 years, according to a orbit highly inclined about 44°.
Haumea and its two satellites, Hi'iaka and Namaka
Haumea is one of the largest members of a family called TNO (Trans-Neptunian Object), its dimensions are 1960 × 1518 × 996 km.
Oort cloud, beyond the Kuiper Belt
The Oort cloud is about 50 000 AU from the Sun, well beyond the Kuiper Belt, it contains billions of nuclei of comets of more than 1.3 km.
>>> Read more...
moons of Mars
moons of Jupiter
moons of Saturn
moons of Uranus
moons of Neptune
Characteristics of Planets
List of asteroids classified by size
Orbits of the solar system
The last frontier...
The dwarf planet
does not clear the way...
Carousel of the solar
The Seven Wonders
of the World...
Axis of rotation of
planets or obliquity...
in the solar system...
of the young Sun...
of the system...
of the planets...
of the planets...
winds in space...
40 largest objects
in the solar system...
Oort cloud at 50,000
AU from the Sun...
Nice model, the late
Paradox of the angular
momentum of the Sun...
Objects in the
The lights of the Sun...
The hellish journey
of the photon...
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