Scientists found water on Mars surface

A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky. These meteors are caused by streams of cosmi…

meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky. These meteors are caused by streams of cosmic debris called meteoroids entering Earth's atmosphere at extremely high speeds on parallel trajectories.

Most meteors are smaller than a grain of sand, so almost all of them disintegrate and never hit the Earth's surface. Very intense or unusual meteor showers are known as meteor outbursts and meteor storms, which produce at least 1,000 meteors an hour, most notably from the Leonids.

Scientists found water on Mars surface - 1
Example Caption

The Meteor Data Centre lists over 900 suspected meteor showers of which about 100 are well established. Several organizations point to viewing opportunities on the Internet.

Historical developments

The first great meteor storm in the modern era was the Leonids of November 1833. One estimate is a peak rate of over one hundred thousand meteors an hour,[4] but another, done as the storm abated, estimated in excess of two hundred thousand meteors during the 9 hours of storm, over the entire region of North America east of the Rocky Mountains.

American Denison Olmsted (1791–1859) explained the event most accurately. After spending the last weeks of 1833 collecting information, he presented his findings in January 1834 to the American Journal of Science and Arts, published in January–April 1834, and January 1836.

He noted the shower was of short duration and was not seen in Europe, and that the meteors radiated from a point in the constellation of Leo and he speculated the meteors had originated from a cloud of particles in space.

Work continued, yet coming to understand the annual nature of showers though the occurrences of storms perplexed researchers.

Famous meteor showers:

  • Perseids and Leonids
  • Other meteor showers
  • Established meteor showers

Scientists found water on Mars surface - 2

Extraterrestrial meteor showers

Any other solar system body with a reasonably transparent atmosphere can also have meteor showers. As the Moon is in the neighborhood of Earth it can experience the same showers, but will have its own phenomena due to its lack of an atmosphere per se, such as vastly increasing its sodium tail.

NASA now maintains an ongoing database of observed impacts on the moon maintained by the Marshall Space Flight Center whether from a shower or not.

Many planets and moons have impact craters dating back large spans of time. But new craters, perhaps even related to meteor showers are possible. Mars, and thus its moons, is known to have meteor showers.

These have not been observed on other planets as yet but may be presumed to exist. For Mars in particular, although these are different from the ones seen on Earth because the different orbits of Mars and Earth relative to the orbits of comets.

  • The Martian atmosphere has less than one percent of the density of Earth's at ground level, at their upper edges, where meteoroids strike, the two are more similar.
  • Because of the similar air pressure at altitudes for meteors, the effects are much the same.

Only the relatively slower motion of the meteoroids due to increased distance from the sun should marginally decrease meteor brightness. This is somewhat balanced in that the slower descent means that Martian meteors have more time in which to ablate.

本文是网络工程师成长日记(www.xacisco.net)原创文章,不授权任何个人和商业组织转载https://www.xacisco.net/55

作者: admin

网工记小编 老郑  思科认证网络专家CCIE13155 微软全球最有价值专家MVP 微软认证系统专家MCSE,微软认证数据库专家MCDBA 通信技术讲师,motorola认证2G,3G技术讲师,nokia认证2G,3G技术讲师 网工记网站创始人,网工记实验室创始人,onelab网络实验室创始人

我要吐槽:

联系我们

联系我们

13810168532

在线咨询: QQ交谈

邮箱: 20004@163.com

工作时间:周一至周五,9:00-17:30,节假日休息

关注微信
微信扫一扫关注我们

微信扫一扫关注我们

关注微博
返回顶部