Our Solar System
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Our Planets
•Sun•Mercury•Venus•Earth•Earth`s Moon•Mars•Jupiter•Saturn•Uranus•Neptune•Pluto Others
•Asteroids•Meteor and Meteorites•Comets
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SunThe Sun is the star at the center of the Solar System
The Sun's color is white, although from the surface of the Earth it may appear yellow because of atmospheric scattering of blue light
The sun is made up entirely of gase light
The sun, like Earth, is magnetic
The sun was born about 4.6 billion years ago
The inside of the sun and most of its atmosphere consist of plasma
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Mercury
Mercury has very little atmosphere to stop impacts
it is covered with craters
Mercury’s surface is overall very similar in appearance to that of the Moon
The orbit of Mercury has the highest eccentricity of all the Solar System planets
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National College Iasi
Venusis the brightest of the planets known to the ancients
it shows phases when viewed with a telescope from the perspective of Earth
Venus is only slightly smaller than Earth
There are no small craters on Venus
Venus is now quite dry
Venus has no magnetic field, perhaps because of its slow rotation.
Venus has no satellitesNational College Iasi
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Earthis the third planet from the Sun and the densest and fifth-largest of the eight planets in the Solar System
Home to millions of species including humans, Earth is currently the only place where life is known to exist
Earth's outer surface is divided into several rigid segments
Earth interacts with other objects in space, especially the Sun and the Moon
The planet is expected to continue supporting life for at least another 500 million years
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National College Iasi
Earth`s MoonIt is the second brightest object in the sky after the Sun
The Moon was first visited by the Soviet spacecraft Luna 2 in 1959
there is no "dark side" of the Moon
The Moon has no atmosphere
Most rocks on the surface of the Moon seem to be between 4.6 and 3 billion years old
The Moon has no global magnetic field
With no atmosphere and no magnetic field, the Moon's surface is exposed directly to the solar wind
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National College Iasi
Mars
is smaller than Earth and Venus
It possesses an atmosphere of mostly carbon dioxide
Its surface, shows geological activity that may have persisted until as recently as 2 million years ago
Its red colour comes from iron oxide in its soil
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National College Iasi
Jupiter
is 2.5 times the mass of all the other planets put together
It is composed largely of hydrogen and helium
Jupiter has 63 known satellites
Ganymede, the largest satellite in the Solar System, is larger than Mercury
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National College Iasi
Saturn
Saturn distinguished by its extensive ring system
Saturn has 60% of Jupiter's volume
The rings of Saturn are made up of small ice and rock particles
Saturn has 62 confirmed satellites
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National College Iasi
Uranus
is the lightest of the outer planets
Uniquely among the planets, it orbits the Sun on its side
It has a much colder core than the other gas giants
radiates very little heat into space
Uranus has 27 known satellites
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National College Iasi
Neptune Neptune, though slightly smaller than Uranus, is more massive and therefore more dense
It radiates more internal heat, but not as much as Jupiter or Saturn
Neptune has 13 known satellites
is accompanied in its orbit by a number of minor planets, termed Neptune Trojans
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Plutois the second most massive known dwarf planet in the Solar System
is now considered the largest member of a distinct population known as the Kuiper belt
is composed primarily of rock and ice and is relatively small
Pluto and its largest moon, Charon, are sometimes treated as a binary system because the barycentre of their orbits does not lie within either body
has two known smaller moons, Nix and Hydra
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Ptolemy's "planetary spheres”"
Modern the Moon Mercury Venus The Sun Mars Jupiter Saturn
MedievalEurope
☾ LVNA ☿MERCVRI
VS
♀VENVS
☉ SOL ♂MARS
♃IVPITER
♄SATVRNV
S
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AsteroidsAsteroids are mostly small Solar System bodies composed mainly of refractory rocky and metallic minerals
The main asteroid belt occupies the orbit between Mars and Jupiter
Asteroids range in size from hundreds of kilometres across to microscopic
The asteroid belt contains tens of thousands, possibly millions, of objects over one kilometre in diameter
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National College Iasi
Meteor and Meteorites
A meteorite is a natural object originating in outer space that survives impact with the Earth's surface
Meteorites can be big or small
have been found on the Moon and Mars
are always named for the place where they were found, usually a nearby town or geographic feature
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National College Iasi
CometsComets are small Solar System bodies, typically only a few kilometres across, composed largely of volatile ices
They have highly eccentric orbits
Short-period comets have orbits lasting less than two hundred years
Long-period comets have orbits lasting thousands of years
Old comets that have had most of their volatiles driven out by solar warming are often categorised as asteroids
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Attractions! Black Hole
click here for detailshttp://www.nasa.gov/multimedia/videogallery/index.html
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The End!
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Scarlat Ioana BiancaCojocariu Diana