【宇宙】ハッブルが捉えた木星面を通過するガリレオ衛星の「トリプルトランジット」©2ch.net

掲載日：2015年2月6日
http://www.sci-news.com/astronomy/science-hubble-triple-transit-galilean-moons-02468.html

The Wide Field Camera 3 on NASA’s Hubble Space Telescope has captured a rare look at three of Galilean moons
– Io, Callisto, and Europa – zipping across the banded face of Jupiter.

The Hubble image on the left (unlabeled at top left, labeled at bottom left) shows the beginning of the event,
which took place on January 24, 2015. From left to right the moons Callisto and Io are above Jupiter’s cloud tops.
The shadows from Europa (not seen in the image), Callisto, and Io are strung out from left to right. Near the end of
the event, approximately 42 minutes later (right-side image), Europa has entered the frame at lower left. Slower-moving
Callisto is above and to the right of Europa. Fastest-moving Io is approaching the eastern limb of the planet; its shadow
is no longer visible on Jupiter. Europa’s shadow is toward the left side of the image, and Callisto’s shadow to the right.
Missing from the sequence is the moon Ganymede, which was outside Hubble’s field of view and too far from Jupiter in
angular separation to be considered part of the conjunction. The moons in these photos have distinctive colors.
The ancient, cratered surface of Callisto is brownish; the smooth icy surface of Europa is yellow-white; and the volcanic,
sulfur-dioxide surface of Io is orange. The apparent fuzziness of some of the shadows depends on the moons’ distances
from Jupiter. The farther away a moon is from the planet, the softer the shadow, because the shadow is more spread out
across the disk. The images were taken with Hubble’s Wide Field Camera 3 in visible light. Image credit: NASA / ESA /
Hubble Heritage Team / STScI / AURA.
http://cdn4.sci-news.com/images/enlarge/image_2468e-Galilean-Moons.jpg

Named after Galileo Galilei who discovered them in January 1610, the Galilean moons are the four largest moons of Jupiter:
Io, Europa, Ganymede, and Callisto.

The four moons complete orbits around the gas giant ranging 2 to 17 days in duration.

They can commonly be seen crossing the face of Jupiter and casting shadows onto its layers of cloud.

However, seeing three moons transiting the face of Jupiter at the same time is rare, occurring only once or twice a decade.

Missing from the sequence, taken by Hubble on January 24, 2015, is the moon Ganymede that was too far from Jupiter in
angular separation to be part of the conjunction.

The image on the left shows the Hubble observation at the beginning of the event.

On the left is the moon Callisto and on the right, Io.

The shadows from Callisto, Io and Europa are strung out from left to right.

Europa itself cannot be seen in the image.

Time-Lapse of Jupiter’s Three Moon Transit on Vimeo
http://vimeo.com/118900879

The image on the right shows the end of the event, just over 40 minutes later. Europa has entered the frame at
lower left with slower-moving Callisto above and to the right of it.

Meanwhile Io – which orbits significantly closer to Jupiter and so moves much more quickly – is approaching
the eastern limb of the planet.

Whilst Callisto’s shadow seems hardly to have moved, Io’s has set over the planet’s eastern edge and
Europa’s has risen further in the west.

Missing from this sequence is the Galilean moon Ganymede which was outside Hubble’s field of view.

The Galilean moons have very distinctive colors. The smooth icy surface of Europa is yellow-white, the volcanic sulfur surface
of Io is orange and the surface of Callisto, which is one of the oldest and most cratered surfaces known in the Solar System,
is a brownish color.

<参照>
HubbleSite - NewsCenter - Hubble Captures Rare Triple-Moon Conjunction (02/05/2015) - Introduction
http://hubblesite.org/newscenter/archive/releases/2015/05/

I am not Abe.

I am hage.

>>4
　　　　　　　　　　　|
　　　　　　　　　 　 |　　彡⌒ミ
　　　　　　　　　　　＼ (´･ω･`)　You're talking about hair again...
　　　　　　　　　　　　　(|　　　|)::::
　　　　　　　　　　　　 　(γ　/:::::::
　　　　　　　　　　　　　　 し ＼:::
　　　　　　　　　　　　　　　　　 ＼

>>5
warota.

can you speak japanese?

this is a pen

ｈａｈａｈａ！

>>4
very interesting

null pointer exception!

chage and aska

oh my god, oh my god...

I know Itagaki!
thank-you.

>11 Guts Ishimatsu.

>11 Guts Ishimatsu.

>>11
Goddamn！

Sun eclipse happening at the black area shaded by each satellite?

Is this so rare eventin Jupiter?
What importance this event has for Jupiter?

let it go！

　_,,..i'"':,
|＼`､:　i'､
.＼＼`_',..-i
　 .＼|_,..-┘…Sigh

nantekotoda……

Dragon Night

Oh my God! It's full of stars!!

　　　　　　　　　　　　 ／）
　　　　　　　　　　　／／／）
　　　　　　　　　 ／,.=ﾞ''"／
　　　／　　　　 i f　,.r='"-‐'つ＿＿＿_　　　Fine thing I do not need！！
　　/　　　　　 /　　　_,.-‐'~／⌒　　⌒＼
　　　　／　 　,i　　　,二ﾆ⊃（ ●）.　（●）＼
　　　/　 　　ﾉ　　　 ilﾞフ::::::⌒（__人__）⌒::::: ＼
　　　　　　,ｲ｢ﾄ､　　,!,!|　　　　　|r┬-|　　　　　|
　　　　　/　iﾄヾヽ_/ｨ"＼ 　　 　 `ー'´ 　 　 ／

Fus Ro Dah

sugeeeeeeeeeeeee

Gee Haa Zulisen Souku

↑
Fack you！
↓

its shadow is no longer visible on Jupiter.
Europa’s shadow is toward the left side of the image,
and Callisto’s shadow to the right.
Missing from the sequence is the moon Ganymede

nuts return please

Nannnanndesuka konosureha

hahaha

stupid gooks

TDN : Will you return me driving licence, if I set knees and
palms on the floor like a dog?

can't find Japanese anywhere!
Shit!
Ain't you all sane? Right?

Wow!
Holy shit excelent picture this.
Hubble, Great!

Say Cheeeeeeeeeeese

日本語だと 衛星三重通過？

よく飽きないね

wtf is this SHIT!

omanco nametai

Warota

atama itaku nattekita

あんなにくっきり影が映るんだ

Let seriously debate Hage-domo

>>3
Japanese left-wingers or farleft-wingers do not show up
in front of Jongryon-related buildings showing placards with
the words 'I am Megumi'.

Would you please look at my kintama ?
What do you think of this ?

何で地球には月の影ができないのじゃ？
日食とかじゃなくてもっと局地的な毎日訪れる影を走って追いかけたいのじゃ

>>49
月の公転軌道面と地球の公転軌道面が
ずれてるから、太陽、月、地球が同一線上
に並ぶ機会がたまにしかない。

こう見ると今にも木星に落ちそうな感じだな

ビー玉みたい

>>48
Wow ! What a tiny monster it is ! Is that your kuritoris ?

Oh my nurupo!

>>54
gaxtsu

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::Ganymede :::::::::::::::::::::::。:::::::::::::::::::::::::::::::::::::::::::::
:::::::::::::::::::::::::::::::::。:::::;:::::...... 　　＿＿、　...　:::::::::::::::::::: ..::::: . ..::::::::::: ..::::: .
:::::::::::::::::...... ....:::::::゜::::::::::::::..　／＿＿＼、ヽ　　::::。::::::::::::::::: ..::::: . ..::::::::::::　゜
:. .:::::。:::........　.　.:::::::::::::: . .　/ |´・ω・`||　.: ::Hey, bros:::::::: ::::::::::::。::::::::::: ..::::: . ..:::
:::: :::::::::.....:☆彡:::　::::. ..: :　/　￣￣　 ､ヽ　:::　 ::::::::::゜:::::::::: ...:: :::::::。:::::::
　::::::::::: ::::::: . . . ..: :::: . ..: :└二⊃　　 |∪:::　:::::::::.... .... ..　.:::::::::::::::::゜:::::::
::::::...゜　.　.:::::::::　　　.......　　ヽ⊃ー/ノ.. .::::::::::::゜::::::::........ ..::::　:::........ ..::

ハッブルハッブル

アメリカに勝つために木星探査機を打ち上げよう。

遠いとボケるんだな
http://subarutelescope.org/Pressrelease/2004/12/23/Fig1_takato.jpg

>>39
お前が負け

>>4
Oh! my sun near hear gay girl

nihongo de おk