Saturday, May 8, 2010

FACts about our Solar System:




Sun
Over one million Earths can fit in the sun.It is too Hot to get close to, a temperature of 10^6 K at its centre and 5000 K on the surface. Sunspots also called as Black spots are the places where the temperature is comparatively less. Sunspots usually come in groups with two sets of spots. One set will have positive or north magnetic field while the other set will have negative or south magnetic field. The Sun also emits low density streams of particles, also known as the Solar Winds. These winds blow through the solar system at 450 km/sec and consist mostly of electrons and protons and responsible for AURORA( the adjoining image).Existing for about 4 and a half billion years, it has burnt up about half of the hydrogen in its core. This leaves the Sun's life expectancy to 5 billion more years, at which time, the Sun's elements will "swell" up, swallow Earth, and eventually die off into a small white dwarf. Proxima Centauri (Alpha Centauri C) is the star nearest to Sun. It is 4.3 light years away from Sun. Every eleven years, the magnetic poles of the Sun switch. This cycle is called "Solarmax". The Sun has circled the Milky Way galaxy for about 20 times only since it's formation. The Sun rotates about it's own axis once every 25.38 days. The light takes 8.3 minutesto travel from the Sun to Earth.

Mercury
It is the closest planet to the sun. It is too hot and dry to live on. There is no air.


Venus
It is the second planet from the sun.Almost the same size and gravity as that of Earth.And has deadly poisonous clouds (acid).

Earth
The third planet from the sun. Most beautiful looking planet from outside space. The Only planet that we know of that supports life. The moon (Natural satellite of earth) plays an important role in sustaining life. Tides are caused due to the attraction force of moon. A fact about moon is that it is going farther from the earth. Another fact is that it has a time period of rotation about its axis which is equal to that of the time period of its revolution around earth.It has gravity, air, water, etc.

Mars
It is the fourth planet from the sun. Its called the red planet. We have sent Rover to mars already in search of life. It has red dust and ice.

Jupiter
The fifth planet from the sun. The image of jupiter shows the movement of storms is in opposite directions hence leading to the very high turbulence. The Only planet with a big red spot (a storm that is very wide). This red spot is constantly having motion inside it. The colour of RED spot has changed. It is the Largest planet in the Solar System.

Saturn
The sixth planet from the sun. Very cold. It has an outer ring around the planet. These are basically rocky material moving around it. If you put Saturn in water it would float.The moon TITAN is now of great interest as there are chances that it can sustain life (bacteria living in very cold climate).

Uranus
The seventh planet from the sun.It is very cold.It has an outer rings around the planet.Unable to see stars because of storms of clouds.

Neptune
The eight planet from the sun. It is very cold. The planet is blue in color.

Pluto
The farthest planet from the sun. But now it is not considered as a planet anymore. This planet falls in Kuiper belt which consist of minor planets. The very startling fact about this planet is : it is rotating about an axis which is horizontal (i.e its axis is perpendicular to the axis of rotation of sun). This planet's orbit is more elliptical as compared to the others. And the plane in which thi planet orbits the sun is different from the plane in which the other planets revolve around the sun. It is the coldest planet. It is very dark. The sun looks very small from this planet. You can see many stars from here.

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