加载中…
个人资料
MEMASHTPLECT_519
MEMASHTPLECT_519
  • 博客等级:
  • 博客积分:0
  • 博客访问:186,154
  • 关注人气:54
  • 获赠金笔:0支
  • 赠出金笔:0支
  • 荣誉徽章:
相关博文
推荐博文
谁看过这篇博文
加载中…
正文 字体大小:

天文学

(2009-04-08 23:11:33)
标签:

杂谈

Solar astronomy
Main article: Sun
 

At a distance of about eight light-minutes, the most frequently studied star is the Sun, a typical main-sequence dwarf star of stellar class G2 V, and about 4.6 Gyr in age.

太阳能天文学
主要文章:孙
在距离约八轻分钟,最常见是研究太阳的恒星,一个典型的主序矮星的恒星级G2期五,约4.6 Gyr年龄。

 

太阳是不被认为是变星,但它的变化进行定期的活动被称为太阳黑子周期。这是一个11岁的波动太阳黑子数。太阳黑子是地区低于平均气温的相关激烈磁性活动。 [ 31 ]
The Sun is not considered a
variable star, but it does undergo periodic changes in activity known as the sunspot cycle. This is an 11-year fluctuation in sunspot numbers. Sunspots are regions of lower-than- average temperatures that are associated with intense magnetic activity.[31]

An ultraviolet image of the Sun's active photosphere as viewed by the TRACE space telescope. NASA photo.
 

The Sun has steadily increased in luminosity over the course of its life, increasing by 40% since it first became a main-sequence star.

The Sun has also undergone periodic changes in luminosity that can have a significant impact on the Earth.[32]

太阳也发生了变化,定期亮度,可以产生重大影响的地球。 [ 32 ]蒙德最低,例如,被认为造成了小冰期的现象在中世纪。 [ 33 ]
The
Maunder minimum, for example, is believed to have caused the Little Ice Age phenomenon during the Middle Ages.[33]

 

The visible outer surface of the Sun is called the photosphere. Above this layer is a thin region known as the chromosphere.

可见外表面的太阳被称为光。以上是这一层薄薄的地区被称为色球。这是一个过渡周围地区的迅速增加,温度,然后由过热电晕。
This is surrounded by a transition region of rapidly increasing temperatures, then by the super-heated
corona.

 

At the center of the Sun is the core region, a volume of sufficient temperature and pressure for nuclear fusion to occur.

在太阳中心的核心区域,数量足够的温度和压力核聚变发生。最重要的核心是辐射区,那里的等离子体的能量通量传达的方式辐射。外层形成对流区的天然气输送能源材料主要是通过物理位移的天然气。据认为,这对流区创建活动,产生磁性孙景点。 [ 31 ]
Above the core is the
radiation zone, where the plasma conveys the energy flux by means of radiation. The outer layers form a convection zone where the gas material transports energy primarily through physical displacement of the gas. It is believed that this convection zone creates the magnetic activity that generates sun spots.[31]

 

A solar wind of plasma particles constantly streams outward from the Sun until it reaches the heliopause. 阿太阳风的等离子粒子流不断向外太阳直至到达太阳驻点。这与太阳风相互作用的磁层地球创造范艾伦辐射带,以及极光的行地球磁场下降到大气中。 [ 34 ]

This solar wind interacts with the
magnetosphere of the Earth to create the Van Allen radiation belts, as well as the aurora where the lines of the Earth's magnetic field descend into the atmosphere.[34]

[edit] Planetary science

 

This astronomical field examines the assemblage of planets, moons, dwarf planets, comets, asteroids, and other bodies orbiting the Sun, as well as extrasolar planets.

[编辑]行星科学
主要条款:行星科学和行星地质学
这天文实地检查组合的行星,卫星,矮行星,彗星,小行星和其他机构绕太阳以及太阳系外行星。

太阳能系统已经比较完善的研究,最初是通过望远镜和后来的航天器。这提供了一个很好的全面了解的形成与演化的行星系统,但许多新的发现仍然被提出。 [ 35 ]
The
solar system has been relatively well-studied, initially through telescopes and then later by spacecraft. This has provided a good overall understanding of the formation and evolution of this planetary system, although many new discoveries are still being made.[35]

0

阅读 评论 收藏 转载 喜欢 打印举报/Report
前一篇:天文学
后一篇:天文学
  • 评论加载中,请稍候...
发评论

    发评论

    以上网友发言只代表其个人观点,不代表新浪网的观点或立场。

    < 前一篇天文学
    后一篇 >天文学
      

    新浪BLOG意见反馈留言板 电话:4000520066 提示音后按1键(按当地市话标准计费) 欢迎批评指正

    新浪简介 | About Sina | 广告服务 | 联系我们 | 招聘信息 | 网站律师 | SINA English | 会员注册 | 产品答疑

    新浪公司 版权所有