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Transcript of Solar system
Mª Luisa Egea Sun Mars Jupiter Saturn Uranus Neptune Planetesimals theory The Sun is a star. It is the source of heat which sustains life on Earth, and controls our climate and weather. It is the closest star to Earth. Definition Structure 1. Core
2. Radiative zone
3. Convective zone
9. Prominence Composition Hydrogen (71%)
Sulfur Solar activity Sun's radiation Charged particles Infrared Visible Ultraviolet Solar flares Sunspots Solar System Sun Planetary System Moons Non stellar objects Inner planets Outer planets Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Closest to Sun
No natural satellites
The core and the mantle are not very well known Mercury Thick silicate mantle/ iron core
Internal geological activity
No natural satellites
Hottest planet Aurora borealis Coronal Mass Ejections Geomagtenic Storms A planetesimal is an object formed from dust, rock and other materials. The word means an object too small to see or measure. The term refers to small celestial bodies formed during the creation of planets. This theory, which explains how planets formed, was suggested by the Russian astronomer Viktor Safronov.
According to the planetesimals hypothesis, when a planetary is forming, there is a protoplanetary disk with materials from the nebulae from which the system came. This material is pulled together by gravity to form small chunks, and these chunks get bigger and bigger until they formed planetesimals. Many of the objects break apart when they collide, but some continue to grow. Some of these planetesimals go on to become planets, comets, Kuiter Belt Objects, and trojan asteroids. The planetesimals formed the core of these gaseous planets, which turned molten when enough heat was created. About 5000 million years ago, nebulae materials began to shake and intereract due to the explosion of a nearby start. Consequently, most of the nebulae matter was condensed, and it began to join in the central part of the future system. The gravity force heated it and
makes that stars can emit light and heat. It was the birth of the Sun. Solar emissions "blowed" into the space a lot of this matter, and the rest was turning around the new start until forming a disk. In that disk appeared the planetesimals. They started to collide, to destroye and to join again. Consequently , the first planets were formed. The planets that were formed near the Sun,
originated the internal rocky planets. And the planets formed away from the Sun, originated the external gas planets. Before that, the planets were cooled and
they formed an atmosphere with the released
gases. Venus Vast volcanoes/rift valleys
Two natural satellites Mars Between the orbits of Mars and Jupiter
Hundreds of kilometres- microscopic
Small Solar System bodies
The largest Asteroid belt Ceres Composed of hydrogen and helium
Ganymede, the largest satellite in the Solar System semipermanent features Jupiter Extensive ring system
Similarities to Jupiter
The least dense planet
62 satellites/ Titan Saturn The lightest of the outer planets
Colder core/ it radiates very little heat
27 satellites/ the largest ones: Titania, Oberon, Umbriel, Ariel and Miranda Uranus Smaller than Uranus but more dense
More internal heat
13 satellites- Triton Neptune Ice bodies like comets Centaurs Creating a Solar
System scale-model Earth Largest/ densest of the inner planets
Current geological activity
Natural satellite/ the Moon Time to remember Only Saturn has a ring system Which is the smallest planet in the Solar System? The astroid belt is between the orbits of _____ and _____ The only planet known to have current geological activity is _____ The outer planets collectively make up ____ % of the mass known to orbit the Sun
89 99 90 The centaurs are ice bodies like ____
asteroids comets stars Mercury Venus Mars Saturn Neptune Uranus Earth Jupiter