8 Page Essay On Solar System

Essay about Solar System

1580 Words7 Pages

Solar System

Humans live on a small planet in a tiny part of a vast universe. This part of the universe is called the solar system, and is dominated by a single brilliant star-the sun. The solar system is the earth’s neighbourhood and the planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto are the Earth’s neighbours. They all have the same stars in the sky and orbit the same sun.

Scientists believe the solar system began about 5 billion years ago, perhaps when a nearby star exploded and caused a large cloud of dust and gas to collapse in on itself. The hot, central part of the cloud became the sun, while some smaller pieces formed around it and became the planets. Other fragments became asteroids and comets,…show more content…

Future manned expeditions could melt the ice into water, for drinking, washing and turning into rocket-fuel: there is enough ice to make a lake 10km across and 10m deep.

Earth

If you approached the Solar System from space, one planet would stand out as very odd. The third world from the sun is brightly coloured, in shades of mainly blue, with patches of red and green, and constantly shifting patterns of white cloud. And it has an unusually large moon; which-by contrast- is dull and uniformly brown.

The perfect planet

Come closer, and you find blue is liquid water. This is the only rocky planet with water. Test the atmosphere, and again this planet is unique: the air contains a lot of reactive gas oxygen. And finally, take a closer look at the green areas. Here there is ample vegetation and animal life. This is the only planet in the solar system obviously inhabited life forms.

The earth is special mainly because it is located at the perfect distance from the sun. The temperature here is just right for water to exist as a liquid: get in as close Venus and the water just boils away as steam, while as far out as the orbit of Mars water is frozen to ice.

Soon after the birth of earth, it was a very different place from the one we know today.
Its “air” was made of the unbreathable and

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Solar System Essay

Solar System

Humans live on a small planet in a tiny part of a vast universe. This part of the universe is called the solar system, and is dominated by a single brilliant star-the sun. The solar system is the earth’s neighbourhood and the planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto are the Earth’s neighbours. They all have the same stars in the sky and orbit the same sun.

Scientists believe the solar system began about 5 billion years ago, perhaps when a nearby star exploded and caused a large cloud of dust and gas to collapse in on itself. The hot, central part of the cloud became the sun, while some smaller pieces formed around it and became the planets. Other fragments became asteroids and comets, which also orbit the sun. The early solar system was a turbulent mix of hot gas and rocky debris.

In the solar system everything is affected by the sun’s gravity. The planets and a variety of other objects, including comets, move the way they do because of the sun’s gravitational attraction. Our planet, Earth, is the third out from the sun. The planets are all different. Their differences are largely the result of their different distances from the sun.

We call the planets that are closer to the sun, including the Earth, the inner planets. They are small rocky worlds. The outer planets are much larger and are made from much lighter materials. All but two planets, Mercury and Venus, have moons in orbit around them.

The Moon

The explorers found a dead world. There is no air and no water. Without an atmosphere, the sky is black at midday and the temperatures swing by hundreds of degrees from day to night. No rivers or oceans have eroded the surface; no volcanoes are rebuilding the boring landscape.

The surface has survived unchanged for billions of years. Smooth plains and lava flows that froze on the Moon long before life arose on the Earth. Elsewhere, the Moon still bears the scars of every rock that has hit it from space, both large and small. The footprints of the visiting astronauts will survive for millions of years.

Crash and splash

Astronomers now believe the Moon is the remains of a giant cosmic traffic accident. In its very early days, the Earth was hit by a runaway planet the size of Mars. White-hot molten rock were splashed into space, and solidified into a ring of rocks around the Earth. These then came together to make up the moon.

Ice on the moon

Circling over the moon’s poles in 1998, the American Lunar Prospector spacecraft discovered patches of ice within some deep craters, where it is always shaded from the Sun, so the ice never melts or evaporates. Future manned expeditions could melt the ice into water, for drinking, washing and turning into rocket-fuel: there is enough ice to make a lake 10km across and 10m deep.

Earth

If you approached the Solar System from space, one planet would stand out as very odd. The third world from the sun is brightly coloured, in shades...

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