<p class="ql-block">Beijing Planetarium</p> <p class="ql-block">北京天文馆推荐的半日游行程，最近学了twinkle star，所以重点开展B馆一层的拓展。</p> <p class="ql-block"><b>1.Travel in the Universe（B馆一层宇宙畅游）</b></p><p class="ql-block"><b>Solar System Family（太阳展厅，太阳家族）</b></p><p class="ql-block">The Solar System comprises the Sun, which is the center, and all objects that are held around the Sun by its gravity, including eight planets, five dwarf planets, no less than 165 satellites, and hundreds of millions of small Solar System bodies such as asteroids, comets, Kuiper belt bodies, and interstellar dust. The eight planets form an important part of the Solar System. Listed based on their distance from the Sun, they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.</p> <p class="ql-block"><b>3D solar system</b></p><p class="ql-block">This exhibition shows the actual distribution in space of the eight planets in solar system using 3D. Here you will have a panoramic and immersive view of the solar system. </p> <p class="ql-block"><b>Information desk.</b></p><p class="ql-block">The solar system family includes not only the sun, the eight planets, but also asteroids, comets, satellite, kuiper belt object, etc. Here you can easily find the Information.</p> <p class="ql-block">The eight planets </p><p class="ql-block">gravity experience: How much does a basketball weigh on other planets? The gravitational acceleration on the eight planets are different. The biggest is jupiter, whose gravitational acceleration is about 2.5 times that of others. And the gravity of mercury is about a 3rd of the gravity on earth. Let's lift the same basketball on each planet, feel the difference of their gravity. </p><p class="ql-block">The planetary worlds in telescope: This exhibition will bring you the 3D planets travel experience. You can visit the surface of each planet. The video here will show you the logical features of each planet and take you to fly over its surface.</p><p class="ql-block">the top of the planet: Each planet has its unique feature. Such as jupiter is the largest planet in the solar system. Mercury has the maximum temperature difference between day and night. come to see the Top of the planet. </p><p class="ql-block">Planetary expression: Eight planets have eight expressions, including pain, lonely or hopeful. Each expression reflects the characteristic of the planet itself. Venus is crying without tears because it is in the 400 degrees all the time. The hopeful eyes from Mars are expecting human visit. Jupiter is proud because it is the biggest one in the solar system. Neptune is remote and lonely.</p> <p class="ql-block">Mercury is the closest and smallest planet to the sun.</p><p class="ql-block">Mercury is about the size of our moon. It is very hot in the day and very cold at night.</p> <p class="ql-block">Venus is the same size as the Earth.</p><p class="ql-block">It spins the other way and much more slowly.</p><p class="ql-block">It is the hottest planet in the solar system. Because it is covered in lava from volcano.</p> <p class="ql-block">Earth is the place where we all live.</p><p class="ql-block">There is land and lots of sea so it looks blue. A moon orbits the Earth.</p> <p class="ql-block">Mars is a rocky, red planet.</p><p class="ql-block">Its mountains are the highest in our solar system.</p><p class="ql-block">It has 2 moons.</p><p class="ql-block"><br></p> <p class="ql-block">Jupiter is a gas giant.</p><p class="ql-block">It is the biggest and spins the fastest.</p><p class="ql-block">It has the biggest moon.</p> <p class="ql-block">Saturn is a gas giant. It has thousands of rings, which are made up of icy rocks.</p> <p class="ql-block">Uranus is an icy gas giant.</p><p class="ql-block">It is the coldest planet in our solar system. And It has rings made of dust.</p> <p class="ql-block">Neptune is an icy gas giant too.</p><p class="ql-block">It is the farthest planet from the sun.</p><p class="ql-block">It has many storms.</p> <p class="ql-block">Compare sizes</p><p class="ql-block">The eight planets models are made according to real proportion. The models show significant differences of the sizes from the largest 60 cm jupiter to the smallest two cm mercury. The earth is less prominent with a diameter of about 5.5 cm. The common feature of the jovian planets is that their sizes are generally large and are all gaseous planets. The common feature of the terrestrial planets is that their size is relatively small, and they all have solid surface.</p> <p class="ql-block">The solar globes. </p><p class="ql-block">This exhibition shows the surface features of the eight planets. </p><p class="ql-block">The rotation of planets showed their true relative rotation speed. Venus' Rotation is the slowest in the eight planets. Jupiter and saturn rotate much faster.</p><p class="ql-block">exploring the stars </p><p class="ql-block">choose a detector on the screen. The ball will show the celestial body being investigated by the detector, and also show the Information about the detector.</p><p class="ql-block">puzzle</p><p class="ql-block">The moon was divided into small pieces. There is a Complete moon photo on the small screen. Put the right pieces in the right position. The ball will show you if you got it right.</p> <p class="ql-block">Probe model. </p><p class="ql-block">Since human launched the first satellite in 1957, thousands of man made spacecraft are now flying into space. These probes are full of humanity wisdom. This is change 2 probe model with scale ratio one to four. The two spacecraft is Chang'e's second lunar probe and the first man made asteroid in the solar system. It was launched on October 1 2000, launched successfully to accomplished its engineering and scientific goal as well as the task to fly over the asteroid 4179 taught at Xichang. Now it is flying farther to the deep space law that orbit around the sun.</p> 2. Moon<div>The Moon, is the only natural satellite of the Earth. The Moon does not emit light, but it reflects the sun's light, which makes it look bright. We can see that the Moon’s visual image is changing daily as it orbits our Earth. That is called the phases of the Moon. In early time, human can only observe the moon with naked eyes. With the invention of the telescope in the 17th century, people can observe the moon in more detail. After the 1950s, humans began send probes to the Moon.<br></div> <p class="ql-block">The jade rabbit visited the lunar</p><p class="ql-block"> on December 15, 2013, Chang'e 3 sentChinese first lunar rover, the lovely jade rabbit to probe on the surface of the moon. Lunar rover carried the panoramic camera measuring equipment such as radar and infrared imaging spectrometer.</p><p class="ql-block">Lunar roving vehicles have to have wide tires to keep from sinking into it.</p> <p class="ql-block">I am an astronaut.</p><p class="ql-block"> The scene simulates the astronauts landing on the moon and the background in the deep space. Here, you can take the lunar module, board the lunar surface and take a picture.</p> <p class="ql-block">The lunar rock</p><p class="ql-block">The lunar rock in the showcase, although only thereupon 5 grams, has extraordinary significance in the history. It was a gift from the united states, which was a part of the lunar rock samples collected by the astronaut of the apollo 17. the sample of lunar rock was only one gram in weight and was divided into two pieces, 0.5 gram of which was used for research, while the other 0.5 gram is what you see here.</p><p class="ql-block">Before astronauts go back to the earth, they will collect rocks and dust samples to send back for further examination.</p><p class="ql-block"><br></p> <p class="ql-block">Lunar globe</p><p class="ql-block">Take a look at a lunar globe. We can see the difference of the surface between the moon and the earth. The lunar globe also marks the Information of a lunar craters, maria and apollo landing sites. There are many craters named after Chinese people.</p><p class="ql-block">This part is covered with hills. And this part is covered with craters. the flat part is smoother. They are like wide field or sea. But there is no water in it.</p> <p class="ql-block">Walking on the moon. </p><p class="ql-block">This footprint, which was left by American astronaut neil armstrong on July 20, 1969, apollo 11 mission, which is the first human footprint on the moon.</p><p class="ql-block"> because the moon surface gravity is only 1/6 of the earth. Walking on the moon is very different from on the earth. Astronauts can take giant steps. They can bounce up and down</p><p class="ql-block">Astronauts like to work on the smoother, but they will keep away from the hills and deep craters.</p><p class="ql-block">Astronauts find no water or living things on the moon.</p> <p class="ql-block">Journey to the sinus iridium.</p><p class="ql-block"> The moon is the only celestial body that human had ever been to. Now let's take the lunar module and go to visit sinus iridium, as you can see through the s, the earth is drifting away. At the same time, we're more and more closer to the moon.</p> <p class="ql-block">Review moon phases</p><p class="ql-block"><br></p> <p class="ql-block">review craters on the moon</p><p class="ql-block">Earth’s atmosphere will burn most meteorites and asteroids before they come in contact with Earth’s surface. The moon, however, does not have an atmosphere to protect it!</p><p class="ql-block">the larger the object, the greater the amount of moon dust that explodes into the air, thus the larger the crater.</p> <p class="ql-block">3. Meteorite</p><p class="ql-block">Occasionally, we may find some rocks that come from somewhere deep in the space or some other planets nearby, bringing to us important information about the history of the Solar System. These objects are virtually the only way for us to get samples from the space except for visiting the Moon. Though they may cause some damages to our mother planet, they give us an opportunity to know about the universe. These are what we call meteorites.</p> <p class="ql-block">The meteorite material. </p><p class="ql-block">The showcases in this exhibition show 20 different beautiful meteorites from different places of the space. Most of the meteorites come from the asteroid belt between Mars and jupiter, with a small amount of meteorites from the moon and Mars. according to the chemical composition, meteorites are mainly divided into three categories, stone, iron and stone iron meteorite.</p> <p class="ql-block">Distinguish the true meteorites</p><p class="ql-block">The meteorite is very rare and very valuable Indeed. then how to distinguish if a stone is from the outer space or not? We can make a preliminary decision by observing the surface characteristics, measuring the density and magnetism of meteorites carefully using the basic method we introduce to you. Can you tell which of these meteorites are the real ones, and which ones are fake?</p> <p class="ql-block">Meteorite fall.</p><p class="ql-block"> This exhibition shows the whole process of meteorite falling. Small objects with small mass tend to explode and disintegrate when entering the atmosphere with a limited impact to the planet. However, if small objects with a mass of more than 10000 tons impact the earth, they will directly hit the earth's surface without slowing down and caused significant damage to the earth, such as nominees and earthquakes. Nevertheless, the probability of such an event is very low. It may only happen once in about tens of millions of years, so we don't have to worry about it. Holographic meteorites video simulates the whole process of impact and the change of small objects parameters.</p> <p class="ql-block">Manufacturing craters. </p><p class="ql-block">You can use your fist to simulate an asteroid with mass greater than 100000 tons. When you hit the soft film hardly, you can see the process of crater formation on the screen by simulation. It is not uncommon to find impact craters on earth. It has been confirmed that there are nearly 200 craters on the earth. On the exhibition wall, We can see the distribution of craters on the earth, as well as some well known photographs in which the craters can be distinguished Clearly.</p> <p class="ql-block">4. The zodiac constellations. </p><p class="ql-block">This star wall centres on the celestial equator and covers the declination between plus and minus 60 degrees, and includes the 13 constellation of zodiac. However, only if you walk to the wall you can see this constellation. give it a try.</p><p class="ql-block">What's your constellation?</p><p class="ql-block">S: Libra.</p><p class="ql-block">Let's find Libra and take a picture with it.</p> <p class="ql-block">5. observatory and telescope </p><p class="ql-block">Can you remember Bulaotun observatory where we observed stars?</p><p class="ql-block">There are many astronomical observing bases on the earth. They are always equipped with big telescopes.</p>