 So, channel, please, I ask Arianne to guide people to fervent, so I'll start, I'll wait, waiting, yes. Okay, can I start today's tour, wait a moment. So, welcome everyone, can you hear me? Okay, so welcome everyone. There is a 3,700-meter sky of Abyss Observatory. Did you visit Newton Cannon at exploratory before? So, that cannon has a bug since physics engine changed, but Patio said they couldn't bug fix it. So, my friend Piosa made this new Newton Cannon, and I proposed to exploratory more about deflation, but exploratory will close the next April. So, I'm searching alternate place. By the way, it is said Newton discovered low gravity when he saw falling apple, but one Nobel Prize winner Hideki Eukawa wrote in his book. One day, Newton lied under an apple tree and looked up the sky, then he saw an apple of the tree and the moon on the tree at the same time. He thought that apple will fall, but the moon doesn't fall. Why? And he found a low command for falling apple and staying moon. So, please look at this photograph. Can you see this photograph of this panel? He saw an experiment. On the top of high mountain, there is a cannon. When the cannon fired a cannon ball, what kind of trajectory does the cannon ball depict? So, come this way. Here is a three rail gun. Wait a moment. I'm sorry. So, my PC has become very heavy. I'm sorry. Wait four or five. Please, I adjust my PC. Okay. So, please look this panel. So, there is a three answer. Thank you, Arian. So, A is straight and lying away from us. The B is falling downward and she's falling back on us. So, in the classroom, I'll ask students, but today for time saving, I continue explanation. So, this is 7.9 km per second rail gun. Very heavy. This is 7.9 km per second rail gun. And this speed is called fast cosmic speed. Usually, a rocket is launched eastward. So, sunlight direction. So, from a place, use the equator because the rocket can use Earth's rotation speed. Then, at the equator, initial speed becomes 7.5 km per second. Come here. So, this is 9 km per second rail gun. Then, and there possible go on cycling around Earth or go away from the Earth's priority or continue revolving around Earth along an elliptical orbit. So, please ride one of the three railguns. Each is spacecraft is for crew ride. So, from now, please try this railgun. So, you all enjoy this little cannon. If you enjoyed, please teleport next place or return to International Space Flight Museum by this teleporter. Please teleport to International Space Flight Museum. So, I'm very sorry for confusing. Then, so, come here. So, here is famous International Space Flight Museum. So, please set the sun position to sunrise. Can you understand what I say? So, menu bar and world and sun position and set to sunrise. Yes. So, look around to which way is the sunrise. So, sunrise direction is eastward. That is a rocket will be launched for sunrise direction. Please remember. Please use this space shuttle model. Space shuttle is stand like this and launched and 9 degree roll and fly to eastward like inverted flight. It means head down altitude and cut off booster rocket. Do you understand why space shuttle is inverted flight? Of course, telecommunication to ground. It is suitable for telecommunication to ground. And another reason is emergency escape. So, space shuttle's emergency escape is not practical and very acrobatic. But also, inverted flight is suitable for emergency escape. And so, space shuttle is fly by a main engine using external tank. Then next roll again. Space shuttle is telecommunication with not ground but tracking and data release satellite. So, space shuttle become normal flight or head up altitude. Then, release external tank. Space shuttle is using orbital maneuvering system to reach first cost mix. Then approach space station. And so, space shuttle is 30, 360 degree turn for inspection. So, after crombus disaster. But we omitted this inspection from this right for time saving. And open cargo bay and docking space station. So, from now please touch this big space shuttle for experience space launch. So, two people once and the interval is 50 seconds. So, please ride from now. I waiting at space station. Someone please ok. So, please next. Launched under 90 degree roll and inverted flight for communication. And released booster rocket. And turn again and so normal altitude. And use the external tank and open cargo bay. Time saving please try later. So, we flight to space station. So, Pyo san says she prepared bus. So, please, please ride on this bus for time saving. Space shuttle takes so many times. Most people is coming here. So, I start guide of international space station. So, at first please remember here is word part of space station. Here is word part of space station. And this side, this way is afterward of space station. So, this way is left side of space station. And this way is right side of space station. So, then most word part. This module is US harmony. There is four crew compartments. And both side of harmony. Japan laboratory, Kibo. Kibo means hope in English. And European laboratory, Columbus. And second module here. So, US laboratory destiny. And 73 meter truss. So, solar battery paddles and radiators. And Canada mobile servicing system. Canada arm too. Then go through this truss. Come up here. Please go through truss. Come up please. I don't know how many people working on this project. I don't know. There is project paper in NASA site. You can download. I worked space station project 30 years ago. Here is US module unity. And here is galley and so meeting place. And right side is airlock for extra vehicle activity. And left side. So, left side is US module tranquility. But built by Italy. So, life support system. And toilet, bathroom. And physical exercise facility. And look at this bottom side. There is cupola. This floor is for Earth observation. And maneuvering Canada arms for catching manned vehicle. And from here, Russian module. Look at bottom side. There are two Soyuz manned vehicle. And stay space station every time. After space shuttle retirement. Space station depends crew transportation on Soyuz only. Once Soyuz carries captain and two passengers. So total six crew. Two Russian captain. And two American. One European. And one Japanese. Total six crew stay at space station. So, if severe emergency occurs on space station. Crews can return to the Earth using two Soyuz spacecraft. And common. Here. Here is so Russian module. Zvezda means star in English. So there is two Russian captain. So two Russian captain are living at this module. Zvezda. So I was working on space station development. And 30 years ago. So at that time very initial design phase on this program. So space station was named Frid. A symbol of USA, Canada, EU, Japan collaboration in Cold War. At that time, please look this panel. You can see. So space station had 12 kids. So dual-kill made more stable by centrifugal force and Earth gravity. You can see this panel. But space station became more complex. So then maintenance time became longer. Because out of atmosphere, there is a space radiation. And the space radiation caused malfunction of electronic devices. So astronauts need to work every hour a day for maintenance. And they couldn't engage in experiments and research works. So NASA was forced to simplify the space station. Another problem. So integration in space is very difficult. So NASA's space station is differentiated in functions into various modules. So they can work only after completion of assemble. In other hand, so Russian space station meal, each module is an independent spacecraft. Each has solar panel and radiator and work independently. So international space station assemble was started from Russian module. And so, you know, space is vacuum. But in fact, space station receives air resistance. So when space station counts night side of the Earth, solar panel set horizontal to reduce the air resistance. Still, it will descend by 2.5 km every month. So when unmanned transport vehicle progress, visit and dock space station. So docking port is here. And progress, reduced space station. So let's go back to forward. So vacuum in space caused another problem. So what do you think? Space is hot or cold? So what do you think? Space is hot or cold? Yes. So space temperature is 3 degree Kelvin or minus 270 degree Celsius. But do you know vacuum bottle? So outside of spacecraft is vacuum. So heat inside of spacecraft can't be removed. So spacecraft need radiator which removed heat by infrared radiation. So you can see big radiator both side of this module. So there is between solar panel, so big radiator. Radiator removed heat by infrared. Another problem is I said outside of atmosphere there is severe space radiation. So third question. If the sandstorm occurs, what will the crew do? So sometimes release severe flare and very severe space radiation is predicted to come to space station. So this part, docking node of Russian module and US module is most insulated area from space radiation. So when the sandstorm is predicted, crew refuges here. Yes, this adapter is most insulated area in the space station. So it is time to go back to brand with space shuttle. I will explain about atmospheric reentry sequence of space shuttle using miniature again. So please look at this space shuttle. I'll write on here. I can't. So first space shuttle and dock from space station. And so 90 degree and so inverted flight and backward flight and orbital maneuvering system back boost and reduce velocity and reduce altitude. And then it's again turned 180 degree in normal flight and so 40 degree up three and enter to atmosphere, reentry to atmosphere. Then space shuttle is covered by plasma and caused adiabatic compression, not air friction. This form, upward force prevent space shuttle descending. Then space shuttle is very acrobatic action. So eight degree bank and opposite side eight degree bank. So space shuttle is repeat this bank. So trajectory is curved like this S letter, like so slalom of ski and reduce descending and reduce altitude descending. And at last catch air and gliding. So become downward a little and gliding like usual glider and landing. So then so you can explain reentry and landing ride by touching that space shuttle. But before I'll announce two things. So one and here you land on the ground. There is an amphibious car ride. So when you ride on it, you can return to the space shuttle launch site and ride on space shuttle launch again. And number two, next Saturday at the same time, I will give a field trip of ultra deep ocean to receive at Japan open grid. One of open sim grid. So SL avatar. And can't teleport to your grid grid directly. So please check information from science circle and please enjoy in next field trip. So my guide is finished here. So please enjoy reentry ride freely. And is there any comment or question? So I can't read chat log because visit my transcript. So thank you very much.