How hot is Mercury?
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?
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?
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?
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.
How close is Mercury to the sun?
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).
How fast does Mercury orbit the sun?
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?
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.
===> 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?
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?
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
Does Mercury have an atmosphere?
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
What is the weather like on Mercury?
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)
What does the sun look like from Mercury?
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.
What is Mercury made of?
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?
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?
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.
Who discovered Mercury?
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?
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.
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?
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.
Is there any water on Mercury?
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.
What color is Mercury?
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