✔ 最佳答案
Solar system's synopsis:
North of the solar system position Milky Way hunting household arm's galactic plane, and circles the Milky Way centre revolution, its edge position for Ou Teyun.
Except that heavenly bodies and so on eight major planets circle outside Japan the movement, circles Japan the movement also to have heavenly bodies and so on comet, planetoid.
Revolution and rotation:
Solar system circles the Milky Way centre movement, simultaneously the planet circles the sun to move, the satellite circles the planet revolution, these heavenly body movement we are called as the revolution.
The sun, the planet and the satellite around the rotation rotation of axis, will also be called the rotation.
Star and planet:
The star itself will shine the heavenly body which will give off heat, its quality and the volume compare the planet in a big way far.
The planet is refers to regarding the star heavenly body, but the partial planet also has the satellite to circle transfers.
Sun's formation:
5,000,000,000 years ago, group revolving gas and the dust, start under own gravitation to contract.
Defends according to the angular momentum weighs the law, in does not have in the external force situation, it will revolve unceasingly and contracts, but the rotational speed will increase unceasingly.
The velocity of whirl increases, in addition friction between the gas granule's, is formed the gas group the accretion plate.
The contraction process continues unceasingly, until the centre section forms a star.
Is far away but meets the respective contraction around the central revolving material, forms the planet. The gas dust cloud original rotation, has become the planet revolution and the solar rotation driving force.
2008-09-05 23:36:20 補充:
Sun's synopsis:
The solar system centre heavenly body, is a blazing gas star.
The sun has concentrated the solar system 99.865% qualities.
The energy mainly (nuclear fusion) produces by the core thermonuclear reaction, its temperature reaches as high as 15,000,000 degrees.
2008-09-05 23:37:31 補充:
Sun internal structure:
Sun's atmosphere divides into the photosphere, the chromosphere level and the sunglow.
Photosphere: The performance has the facula, the sun-spot.
2008-09-05 23:38:10 補充:
Chromosphere level: The performance has the solar flare (flocculus), the dark strip and the prominences.
The solar wind arrival will have the influence to the Earth, like aurora.
2008-09-05 23:39:14 補充:
Sun-spot and Earth:
The temperature is approximately 4500K ( to temperature), under the photosphere sets off appears dark.
2008-09-05 23:39:29 補充:
(Umbra) and (half-shadow) constitutes by the dark nucleus regarding its bright part.
Has the formidable magnetic field sun-spot mainly to appear in the low latitude area.
Sun-spot's cycle is 11 years, its cyclical and Earth's rainfall has the remarkable relations.
2008-09-05 23:39:43 補充:
Kind of place planet and jovian planet:
Kind of place planet:
Mercury, Venus, Earth, Mars.
Characteristic:
The quality is small, the volume is thin, the auto-rotation rate is slow, satellite quantity are few.
Jovian planet:
Jupiter, Saturn, Uranus, Neptune.
2008-09-05 23:40:11 補充:
Characteristic:
The quality is big, the volume is big, satellite quantity are many, the auto-rotation rate is quick, has the link existence.
2008-09-05 23:40:23 補充:
Short planet:
The short planet is a solar system heavenly body additional category. on August 24, 2006, the international astronomy association resolution Pluto, the ceres, distress Reese will classify this new category, is called the short planet.
2008-09-05 23:40:50 補充:
The comet (in near circular orbit on circles an idioplasm quantity small fog shape small heavenly body comet few) in the flat long track which the sun moves generally by the broom and the tail of comet is composed.
2008-09-05 23:41:54 補充:
But,its material is blown out, in forms the coma to sun's direction, these materials by the solar wind, the light pressure and so on to are boosted, form the tail of comet, therefore the tail of comet direction is certainly dislikes the sun (, even if comet recession is also).
2008-09-05 23:42:13 補充:
The comet track is the extremely flat ellipse, even is the parabola or the hyperbolic curve track.
The periodic comet divides into the short period (to circle Japan revolution cycle short and the long period (circles Japan revolution cycle in 200 years) to surpass 200 years) the comet.
2008-09-05 23:44:15 補充:
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