用英语介绍太阳系

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Jupiter is the fifth planet from the Sun and the largest planet within the Solar System.
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Jupiter is primarily(主要） composed of hydrogen（氢） with a quarter of its mass being helium（氦）. The outer atmosphere is visibly segregated（分成) into several bands at different latitudes, resulting in turbulence(漩涡） and storms along their interacting （相互）boundaries.
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Its large mass produces temperatures and densities （密度）in its core（核心） great enough to sustain nuclear fusion（核聚 变）,which releases enormous amounts of energy, mostly radiated into space as electromagnetic radiation（电磁波）, peaking in the 400– to–700 nm band we call visible light.
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The English name for the planet comes from the Romans, who named it after the Roman god Mercury, which they equated with （认为… 和…相同）the Greek Hermes （赫尔墨斯）
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The rings of Saturn are the most extensive (大规模） planetary ring（行星 环） system of any planet in the Solar System . They consist of countless （无数） small particles, ranging in size from micrometre to metres that form clumps(块） that in turn orbit about Saturn.
• The Mars is named after the Roman god of war.
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Olympus Mons is a volcanic mountain（火 山） on the planet Mars. It is a little under three times as tall as Mount Everest （珠 穆朗玛峰） and is the tallest known volcano in the Solar System.
** The Sun is the star at
the center of the Solar System. It has a diameter(直径） of about 1,392,000 km, . about 109 times that of Earth, and its mass accounts for about 99.86% of the total mass of the Solar System.
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Great Red Spot（大红斑） is a giant storm that is known to have existed since at least the 17th century when it was first seen by telescope.
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Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Saturn is classified as a gas giant which is sometimes referred to as the Jovian, meaning “Jupiterlike”planets. （类木 行星）
Solar System
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The solar system consists of the Sun and the astronomical objects bound to it by gravity ,all of which formed from the collapse(塌下) of a giant molecular cloud (分子云）approximately 4.6 billion years ago.Most of the mass is contained within eight planets including the Earth.
赫尔墨斯：希腊神话中为众 神传信的神
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Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude （星等）of 4.6, bright enough to cast shadows.
Mercury is the innermost（最深 处的） and smallest planet in the Solar System,orbiting（在……轨 道上转动） the Sun once every 87.969 Earth days. The orbit (轨道） of Mercury has the highest eccentricity （反常）of all the Solar System planets, and it has the smallest axial tilt（倾斜轴）. It completes three rotations（转动） about its axis（轴） for every two orbits.
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Uranus is the seventh planet from the Sun. It has the third-largest planetary radius （行星半径） and fourth-largest planetary mass in the Solar System. It is named after the ancient Greek deity of the sky Uranus .
缺一张金星夜 空图
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Mars is the fourth planet from the Sun in the Solar System. It is often described as the “Red Planet”, as the iron oxide（氧 化铁） prevalent （普 遍）on its surface gives it a reddish （淡 红色） appearance.
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Neptune is the eighth and farthest planet from the Sun in our Solar System. Named for the Roman god of the sea, it is the fourthlargest planet by diameter(直径） and the third-largest by mass.
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Venus reaches its maximum brightness shortly before sunrise or shortly after sunset, for which reason it has been known as the Morning Star or Evening Star.