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令人惊叹的夜空现象

ScienceCasts: Amazing Sunset Sky Show

【音乐】
[ music ]
令人惊叹的夜空现象-NASA科学发布
Amazing Sunset Sky Show – presented by Science@NASA
如果你喜欢观星
If you love stargazing,
有个日期一定要记在日历上
there’s a date you need to mark on your calendar.
那就是6月
It’s June.
没错 整个6月!
That’s right, the whole month!
在2015年的6月里
Throughout the month of June 2015,
夜空中最亮的两颗行星
the two brightest planets in the night sky,
金星和木星 将会出现神奇的亲密交会
Venus and Jupiter, are going to converge for a jaw-dropping close encounter.
你一定不想错过任何一幕
You don’t want to miss any of the action.
日落时分 走到户外 朝西方看
When the sun goes down, step outside and look west.
不用等到天色完全暗下来
You don’t have to wait until the sky fades to black.
因为金星和木星都很明亮
Venus and Jupiter are so bright,
暮色里 能看到它们在闪烁
you can see them shining through the twilight.
实际上 有人说 傍晚时分的
In fact, some people say the planets are especially beautiful
那片深蓝色中看到的星星最美
when they are surrounded by the cobalt hue of the early evening sky,
所以 别等着
so don’t wait.
6月的前两个星期里
During the first two weeks of June,
金星和木星会越来越近 一直到相距10度
Venus and Jupiter converge until they are only about 10 degrees apart.
提醒一下 这表示北斗勺里的金星和木星
For reference, this means they would just fit together
在同一条线上
inside the bowl of the Big Dipper.
伸出胳膊 你用手掌可以
You could hide them both, simultaneously,
同时将它们盖住
behind the palm of your outstretched hand.
金星和木星已经离的很近了
This is pretty close,
但到了6月底
but by the end of the month
它们之间的距离会缩小30倍
this distance will shrink by a factor of 30.
事实上 6月的每天晚上
In fact, every night in June,
都能观察到金星和木星之间的距离在缩小
the separation between Venus and Jupiter will visibly shrink.
6月12日晚 是察看会合进程的好时候
One good night to check on their progress is June 12th.
天黑后 用双筒望远镜观察金星周围的天空
After dark, scan the sky around Venus with binoculars.
就能看到鬼星团!
You can see the Beehive Star cluster!
金星正好穿过它
Venus will be passing right by it.
在6月18日 金星和木星会相距六度
On June 18th, Venus and Jupiter will be only 6 degrees apart.
现在 你伸出手 仅用两三根手指
Now you can hide the two behind just two or three of fingers
就能把它俩盖住
with your arm outstretched.
6月19日 令人激动的一幕出现:新月加入
On June 19th, something exciting happens: the crescent Moon joins the show.
这天晚上 月亮 金星
On that evening, the Moon, Venus
和木星 在夜空中构成了
and Jupiter will form a bright isosceles triangle
一个清晰的等腰三角形
in the sunset sky.
等腰三角形是指两个边等长的三角形
Isosceles means that two sides of the triangle are the same length.
大多数北美的观星者会看到这一现象
This is how most sky watchers in North America will see it.
过一晚 到6月20日时
One night later, on June 20th,
顶点变更 构成另一个等腰三角形
the vertices rearrange themselves, forming yet another isosceles triangle.
这个几何形状精美绝伦
Never has a geometry lesson been so beautiful.
顺便说一下 6月19日和20日的晚上
The nights of June 19th and 20th, by the way,
是观星的最佳时间
are good nights to look through a telescope.
即便用小型望远镜也能看到金星的新月相
Even a small telescope will show you the fat crescent phase of Venus,
木星云层顶端与众多的木星卫星
the cloudtops and largest moons of Jupiter,
和月球坑坑洼洼的表面
and the rugged terrain of Earth’s own Moon.
将你的光学器材转向三角形
Swing your optics around the triangle
看一场快速的视觉盛宴
for a fast-paced heavenly show.
也能看到地球反射的光 这是因为
Also visible is Earthshine-that is,
月球黑夜那面的光是地球反射的阳光
illumination of the night side of the Moon provided by sunlight reflected from Earth.
这就是人们常说的
This is sometimes called “ the Old Moon
“新月抱旧月”
in the New Moon’s arms. ”
这个奇特的现象 不用望远镜也能看到
It’s a beautiful sight— no telescope required.
通常出现在6月30日
The main event occurs on June 30th.
在这天晚上
On that night,
金星和木星只相距1/3度 令人惊叹
Venus and Jupiter will be a jaw-dropping 1/3rd of a degree apart.
距离小于满月的直径
That’s less than the diameter of a full Moon.
伸出手 你不仅能用手掌
You’ll be able to hide the pair not just
盖住金星和木星
behind the palm of your outstretched hand,
用小拇指就能盖住 哇!
but behind your little pinky finger. Wow!
希望在6月里你能花一些时间
Here’s hoping you spend a lot of time under the stars
在观察星体上面
and planets in June.
更多关于夜空星体的信息
For more news about bright lights in the night sky,
尽在Science.nasa.gov
stay tuned to Science.nasa.gov

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关于金星合木星现象的介绍

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收集自网络

翻译译者

Shinoo

审核员

审核员 RN

视频来源

https://www.youtube.com/watch?v=_ppuCZR8Mkw

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