注目の話題: 女性の友達ってどうやって作れば良いですか？; 独身、恋愛経験なし。これから何を目標に生きたらいいか？; どっちの妻がいい？

Let's enjoy English!

No.437　13/05/08 21:46
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【Being under a starlit sky.】

The comet learns to have an orbit as if it described a parabola 放物線 around the sun.Some comets return where they used to be after long time passes.🌠

We call them periodic comets.The famous one is Halley's comet which come round again every 76 year.😃

When the comet happens to passes by the earth,we can see it as a gicantic one.The comet of Hale-Bopp in 1997 became so enormous which we'd never seen recently that plenty of people could see it.🌠

Some comets sometimes bump against a planet owing to their orbits,and the ninth comet of シューメイカーレビー actually collide with the Jupiter in 1994.It was a happening which we humankind witnessed in the first time.😲

If the comets really bump against the earth,something serious will occur.Therefore there are some groups for research of asteroids which try to discover the asteroids approaching the earth.🌏

While the comet is dangerous,some people think it carried an origin of a life into the earth.🌠