How hot is Mercury?
水星多熱
Since Mercury is the closest planet to the sun, spins slowly, and does not have much of an atmosphere to trap heat, its temperature varies greatly. Mercury's temperatures can go between -279 Fahrenheit (-173 Celsius) at night to 801 Fahrenheit (427 Celsius) during the day (This is hot enough to melt lead!).
由於水星是最靠近太陽的行星，緩慢的旋轉，並且不會有大氣抓住熱，它的溫度差別很大。水星的溫度可以在晚上華氏零下279度（攝氏零下173度） 白天到 華氏801度（攝氏427度）之間 ( 熱到足以融化鉛）
Why does Mercury have more craters than the other planets?
水星為什麼比其他行星有更多隕石坑
All of the planets in our solar system have had a lot of craters. This was especially true in the past when there were many more meteoroids traveling in our solar system than there are today. On planets like Venus, Earth and Mars, we do not see as many craters because most of them have been eroded away by wind, rain, volcanic activity and other forces. On the giant gas planets, Jupiter, Saturn, Uranus and Neptune, we do not see any craters because there is no visible solid surface for the meteors to hit. On the Mercury, where there is no atmosphere, there is no weather to erode away the craters, so most of the craters are still visible.
How small is Mercury compared to Earth?
在我們的太陽系的行星都l有很多隕石坑。這是在過去時有更多的隕石在太陽系流浪，在金星，地球和火星等行星上我們沒有看到很多隕石坑，因為他們大多數已被風，雨，火山活動和其他勢力的侵蝕。在巨大的氣體行星，木星，土星，天王星和海王星，我們沒有看到任何隕石坑，是因為沒有可見的固體表面可被隕石擊中。對水星來說，那裡是沒有大氣，有沒有天氣會削弱了隕石坑所以大部分的隕石坑仍清晰可見
水星和地球比有多小
Mercury has a diameter of 3,032 miles (4,879 km) making it a little more than one third the size of Earth. If Earth were the size of a baseball, Mercury would be about the size of a golf ball.
水星直徑是 3032 英里 (4879 公里) , 略多於三分之一的地球大小的。如果地球是一個棒球的大小 水星將一個高爾夫球大小。
How strong is the gravity on Mercury?
水星上重力多強
Since Mercury has less mass than Earth, the surface gravity on Mercury is less than the surface gravity on Earth. The surface gravity on Mercury is only about 38% of the surface gravity on Earth, so if you weigh 100 pounds on Earth, you would weigh only 38 pounds on Mercury.
由於水星的質量比地球少，水星表面的重力小於地球表面引力。水星上的表面重力只有約38％的地球表面引力，因此，如果你的體重100磅地球上，你在水星上只有38磅
How close is Mercury to the sun?
水星離太陽多近
Mercury is the closest planet to the sun. It's orbit around the sun is very elliptical, like a stretched out circle. Mercury's distance from the sun ranges from 28.6 million miles (46 million km) to 43.4 million miles (69.8 million km).
水星是最靠近太陽的行星。它繞太陽運行的軌道是非常像橢圓形的像一個伸出的圓圈。水星離太陽的距離從2860萬英里（4600萬公里）到4340萬英里（6980萬公里）範圍
How fast does Mercury orbit the sun?
水星繞太陽軌道多快
Mercury circles the sun in only 88 days, compared to 365 days for Earth, at at an average speed of 107,088 miles (172,341 kilometers) per hour. This is faster than any other planet in the solar system.
水星繞太陽公轉只有88天，相比地球繞太陽公轉為 365天 , 每小時的平均速度107088英里（172341公里）。比太陽系任何行星都還快。
How long is a day on Mercury?
水星一天多長
A planet's day is the time it takes the planet to rotate or spin once on its axis. Mercury rotates very slowly compared to Earth so a day on Mercury is much shorter than a day on Earth. A day on Mercury is 58.646 Earth days or 1407.5 hours long while a day on Earth is 23.934 hours long.
一個星球的一天是星球軸線的旋轉或自旋。和地球比水星的旋轉非常緩慢，所以水星上的一天比地球上的一天短?
。水星上的一天是58.646個地球日或1407.5小時，而地球上的一天長23.934小時
===> 這邊有問題 , 字面說 水星上的一天比地球上的一天短 ,
但轉得很慢 應該是 比地球的一天還長吧 ..如以地球時間為單位
How long is a year on Mercury?
水星一年多長
A year on Mercury is about 88 Earth days long. Mercury has the shortest year of any planet in the solar system.
一年約 88地球天, 比起其他行星水星有最短的一年
How far is Mercury from Earth?
水星離地球多遠
Mercury is the first planet from sun and Earth is the third planet from the sun. Mercury is an average distance of 48 million miles (77 million km) from Earth
從太陽數來水星是第一顆行星和地球的是從太陽數來的第三顆行星。從地球到水星的平均距離4千8百萬英里（7千7百萬公里）
Does Mercury have an atmosphere?
水星有大氣層嗎 ?
Mercury has an extremely thin atmosphere which is made up of atoms blasted off its surface by the solar wind, a constant stream of particles coming from the outer layer of the sun. Because Mercury is so hot, these atoms quickly escape into space. Unlike the stable atmospheres of Earth and Venus, Mercury's atmosphere is constantly being replenished
水星極有其稀薄的大氣，它是由原子組成是因為來自太陽的外層粒子的太陽風，其表面由於水星會這麼熱，這些原子迅速逃逸到太空。不像地球和金星有穩定的大氣。水星的大氣中須要不斷地被補充。
What is the weather like on Mercury?
水星上的氣候是如何
Since Mercury has hardly any atmosphere, it does not have weather like storms, clouds, winds or rain. Its surface temperature can reach 801 Fahrenheit during the day (because it is so close to the Sun) and can drop to -279 Fahrenheit at night (because there is no atmosphere to trap the daytime heat)
由於水星幾乎沒有任何大氣，它並沒有像風暴，雲，風或雨的天氣。白天其表面溫度可達到華氏801度（因為它是如此接近太陽），晚上可以下降到華氏零下279度（因為沒有大氣會抓住白天的熱）
What does the sun look like from Mercury?
從水星上看太陽會如何
Since Mercury is the closest planet to the sun, the sun would look much larger from Mercury than it would from any other planet in the solar system. From Mercury the sun would appear to be about 2 1/2 times larger than it appears from Earth.
由於水星是最靠近太陽的行星，太陽看起來會比從任何其他行星在太陽系水星較大。從水星上看太陽會比從從地球上出現大約2.5倍
What is Mercury made of?
水星的組成為何
Mercury is a rocky planet with a huge iron core which makes up a large part of its interior. The core takes up nearly 3/4 of the planet's diameter. Mercury's iron core is about the size of the moon. Iron makes up about 70% of Mercury's total weight making Mercury the most iron-rich planet in the solar system. On top of this core, lies an outer, rocky shell which is about 350 miles (~550 km) thick.
水星是與一個巨大的鐵核，這使得其內部的很大一部分的岩石行星。核心佔用了行星的直徑近3 / 4的。水星的鐵的核心是差不多是月球的大小。鐵核新約佔水星的總重量約 70％使水星在太陽系中是含鐵最豐富的星球。在這個核心之上，其外層這是約 350英里（約550公里）厚的岩石外殼
How old is Mercury?
水星有多老
Mercury was formed at the same time as the rest of the solar system, from a large spinning disk of gas and dust. Astronomers think that all this happened about 4.6 billion years ago! So Mercury is about 4.6 billion years old
水星和太陽系的其餘部分的同時期形成，從一個大的旋轉的氣體和塵埃形成。天文學家認為，約 46億年前發生的這一切！因此，水星約 46億歲
=> 怪了 billion 是 10億 ..為何 4.6 billion google 一直翻 4.6億
How many spacecraft have been to Mercury?
有多少太空船到過水星
Only one spacecraft has ever visited the planet Mercury. It was called Mariner 10. During 1974 and 1975, Mariner 10 flew by Mercury three times and mapped about half of the planet's surface. Mariner 10 also discovered Mercury's thin atmosphere and detected its magnetic field.
只有一個太空探測器到過水星。它被稱為水手10。在1974年和1975年，水手10號飛越水星三次，並照過水星表面一半左右。水手10號還發現水星的稀薄的大氣層和偵測到它的磁場。
Who discovered Mercury?
誰發現水星
There is no single person who is credited with the discovery of Mercury. Mercury is one of the five planets that can be seen in the night sky without using a telescope or binoculars. The planet Mercury has been known since ancient times and was observed for thousands of years by the people of many different cultures. One of the earliest records of Mercury comes from the Sumerians around 3,000 BC. Since Mercury never travels far from the sun in the sky, it is more difficult to see and was probably discovered later than brighter planets like Venus, Mars, Jupiter and Saturn.
沒有任何單一的人發現水星的記錄。水星是五個行星之一且不使用望遠鏡或雙筒望遠鏡就可以在夜空中看到。自古以來一直被稱為水星，是由許多不同文化的人民千百年來觀察。水星的最早記錄之一是大約公元前3000年的蘇美爾人。由於水星在天空中從未遠離太陽 ，這是比較難見到，可能是因此 發現比其他明亮的行星，如金星，火星，木星和土星還晚。
How did Mercury get its name?
為何會取名為水星 ?
The Romans knew of seven bright objects in the sky, the sun, the moon and the five brightest planets. They named them after their most important gods. Because Mercury was the fastest planet as it moved around the sun, it was named after the Roman messenger god Mercury. Mercury was also the god of travelers. According to myth, he had a winged hat and sandals, so he could fly.
羅馬人知道七明亮的物體在天空，太陽，月亮和五個最亮的行星。他們命名是取其最重要的神名。因為水星它繞太陽移動是最快的行星，它被命名為水星是羅馬神話中眾神的信使。水星也是旅行之神。根據神話，他有翅膀的帽子和涼鞋所以他能飛。
ps. 中國又稱為辰星 但 水星中文名稱由來
??
How long does it take to get to Mercury from Earth?
從地球到水星要多久
How long it would take to travel to Mercury would depend on where Earth and Mercury were in their orbits at the time a spacecraft started its journey from Earth, and also on the path chosen. For example, Mariner 10 was launched on November 3, 1973 and it arrived at Mercury on March 29, 1974.
太空船從地球到水星要多久和地球和水星的軌道間位置有關, 所選擇的道路上也將取決於此。例如，水手10號，1973年11月3日發射，它在1974年3月29日到達水星。
Is there any water on Mercury?
水星上有水嗎 ?
Recent radar data shows that water ice may exist in the bottoms of craters at Mercury's poles. Although Mercury is the closest planet to the sun, and can be extremely hot over most of its surface, ice may exist at the bottoms of some polar craters because the crater floors are permanently shadowed by the crater rims. Mercury's axis has almost no tilt, so its poles receive very little direct sunlight.
最近的雷達數據顯示水冰可能存在於水星的兩極的隕石坑底部。雖然水星是最靠近太陽的行星，且其表面非常熱，冰可能存在於一些極地隕石坑底部，因為火山口底部是陰影區。水星的軸幾乎沒有傾斜，所以它的兩極收到直射陽光很少。
What color is Mercury?
水星是甚顏色
Planets have the colors that they have because of what they are made of and how their surfaces or atmospheres reflect and absorb sunlight. Mercury has a dark gray, rocky surface which is covered with a thick layer of dust. The surface is thought to be made up of igneous silicate rocks and dust
行星的顏色是因為它們是由其表面或大氣反射和吸收太陽光產生。水星有一個暗灰色，這是一層厚厚的灰塵覆蓋的岩石表面。該表面被認為是由火成岩的矽酸鹽岩石和塵埃
會員專區 
