ADM-201 dump PMP dumps pdf SSCP exam materials CBAP exam sample questions

所有星系的旋转方式都是一样的 – 译学馆
未登录,请登录后再发表信息
最新评论 (0)
播放视频

所有星系的旋转方式都是一样的

All Galaxies Spin The Same

In 2018, astronomers discovered that no matter how big
2018年 天文学家发现无论多大的星系
all galaxies rotate once every billion years.
每十亿年都会旋转一次
The researchers think this is really wierd.
研究人员认为这非常奇怪
Lead researcher Gerhardt Meurer said
首席研究员Gerhardt Meurer说
that it’s kind of odd that small galaxies and big galaxies all orbit the same time.
大、小星系具有相同的自转周期是有点奇怪
This means that regardless of whether a galaxy is very big or small,
这意味着无论一个星系是大是小
if you could sit on the extreme edge of its disk as it spins,
当它旋转时 如果你处于它盘面的边缘
it will take you about a billion years to go all the way around.
你转一圈大约需要十亿年的时间
To carry out the study,
为了进行这项研究
the researchers determine the radial velocites of neutral hydrogen
研究人员测量了许多星系盘面外缘的
in the outer disks of a lot of galaxies,
中性氢径向速度
ranging from small dwarf irregulars to massive spirals.
从较小的矮不规则星系到巨大的螺旋星系 不一而足
These galaxies were different in both size and rotational velocity
这些星系大小 旋转速度都不同
by up to a factor of 30.
差异可达30倍
These measurements helped researchers
这些测量可以帮助研究人员
to calculate the rotational period of their sample galaxies,
计算实验样本星系的旋转周期
which led them to conclude that
并以此得出结论:
the outer rims of all disk galaxies take about a billion years
所有盘状星系的外缘需要十亿年的时间
to complete one rotation.
完成一个周期的旋转
Based on theoretical models,
根据理论模型
the researchers also expected to find only sparse populations of young stars
研究人员预期会在这些星系的边缘发现
and interstellar gas on the outskirts of these galaxies.
一些零星的年轻恒星和星际气体
But they found evidence of older stars existing at the edge of galaxies.
但他们发现了老年恒星在星系边缘存在的证据
Usually only newly formed stars and gas have appeared there.
通常只有新形成的恒星和气体才会出现在那里
The researchers said that the dicovery
研究人员称这项发现
would help astronomers understand where galaxies end.
可以帮助天文学家明白星系的边缘在哪里
Thus no longer wasting time
因此不需要在边缘之外的数据上
and computer processing power on data beyond their edges.
浪费时间和计算机运算能力
However, the next generation of radio telescopes would generate enormous amounts of data.
然而 下一代射电望远镜可以产生大量数据
Professor Meurer said,
Meurer教授说
when the Square Kilometer Array comes online in the next decade,
十年后 当平方公里阵列射电望远镜上线时
we’ll need as much help as we can get to characterize the billions of galaxies,
我们会需要尽可能多的帮助来描述上亿的星系
these telescopes will soon make available to us.
我们很快就能使用这些望远镜了
If you like this channel and want to support us,
如果你喜欢这个频道 并想支持我们
please subscribe and hit the bell icon.
请订阅 点击小铃铛的图标

发表评论

译制信息
视频概述

所有盘状星系的旋转周期是一样的

听录译者

飞也用不着

翻译译者

Syllab

审核员

审核员SR

视频来源

https://www.youtube.com/watch?v=g1vPCkifUew

相关推荐