 Hello. Good evening, everyone. My name is Jayati Pishra. He is Ram Mohan Kumar and she is Saloni Mundra. We are here to present before you an open sky penetorium. So, first of all, what is an open sky penetorium? It is a device that can be used to point the stars on other celestial bodies in the night sky. So, first of all, the question pops up. Why do we need them? The limitation of the conventional penetorium is that we can only find them in big cities. They require huge cost to set up. They have high maintenance time. So, what we thought is instead of going to penetoriums, let's bring them to us in a very cost-effective and affordable manner. So, in this, we use interfacing between the hardware and the software. The software that we use here is Stellarium. It is an open source tool. That is a database of all the known stars. It consists the celestial coordinates of all the known stars. So, we have designed this plugin and this plugin sends the coordinates of the corresponding star that we need to point to our hardware. And the hardware correspondingly points to the particular star. So, we will directly start with the demonstration. Why is that star moving? Sir, it is a real-time simulation environment. Which one? Click on it. Okay. Just click into the sets to see it. Which one? Which one? Yeah, click on it. Sir, it's a satellite. It's a satellite, sir. Artificial satellite. Okay. So, actually, as we cannot go out and just see the sky or the stars or not with us. So, here, we are just demonstrating it. So, we will directly start with the demonstration. So, this is the plugin which acts as a mediator between Stellarium and the hardware. So, initially, first we will select the device and then we will turn on the laser. And there is an intensity slider. So, we will set it to a desired value. So, you can see the laser there. So, now, first we will have to calibrate the device with at least two known stars and at max of three, as of now. So, first, let's select Sargas and take the laser to it. And we marked it on the board as S. For the motor speed, we have two modes. First is the course mode which makes it move at a higher speed and find mode makes it move at a slower speed. So, if you're pointing to a far-off star, you can first go at a very high speed and then to set the precision, you can go at a lower speed. So, we have selected the star and we'll set it as reference by clicking on self-reference. And we can see the azimuthal and altitude coordinates in radiance for that star. Now, we'll select Sargas. We've selected that on that. Actually, it's not visible because of the display. Now, we'll select another star at rear and perform a similar thing for it. Also, in the current coordinate section, you can know how much you have moved in degrees in the X and the Y direction. Set reference. For demo purposes, we'll show you the calibration with three stars. So, now the laser direction control and everything else is disabled and you can take any star on the on stellarium and point the laser device to it. So, let's go to Mimosa and click the go to button. So, for demonstration purposes, we'll move between these three stars and let's try to go back to Sargas. We'll again select Sargas and press the go to button. So, it's pointing to Sargas now. Let's go to Atria. So, the main idea behind this is to develop a script engine. So, you can write all those, you can do the calibration and write a script and this can be used to run planetarium shows in rural schools where you can see an open sky. So, as of now there's, you can also add an audio file. That's an enhancement to the plugin and is yet to be developed. And we have written a sample script. Click on open. So, the command is to go to serious. It's not actually displayed on this GUI. It will go to it or wait for three seconds and then turn the laser off. Select any other star. So, it will select any other star because it's not. Look, actually it was not in the horizon. Yeah, it's not in the horizon level. So, we'll write a new script and do it. So, it will take a lot of time to search for it because it's not visible right now. That's right. You can't close the plugin. Close the plugin. What is the idea? So, the idea is to write scripts for like half an hour or an hour. And then, so this is an open source software, which simulates the real time sky. So, yeah, we can even set the location. So, basically the idea is to first calibrate using at least two stars and the third star calculates automatically. And then, you can write scripts which can be run. So, like, and you can also add audio to it. So, as if the show is going on, if the laser is pointing to some star, then a story can be told about that star. And this is an actual laser. Sorry? Why do you need a laser? Why can't I just project this, add some software to it, this is a background and show it. Yes, so that's an alternative to a conventional planetarium. A conventional planetarium has a dome-like structure. But it becomes very expensive and these are mostly located in cities. I'm just saying use this screen as a planetarium. This is a plane screen. Sorry? There is a moon. Okay, we can search it now. Search it. Search. Sir, as of now it's developed only for stars, not for satellites and... Yeah, yeah, we're showing it on Stellarium, but the hardware is developed for stars. Sorry? Yeah, it can... We have reset it. Yeah, we can just go up. Yes, that's the main purpose of this. Yeah, sir, the main purpose is to use the night sky as the dome rather than building one. Okay, that is the part. Yeah. Actually, sir, since we have a working order, we came here and we made a working order, we didn't find a clear sky. Yes, sir. And we'll test it here, sir. Yeah. And then the software will point whatever I want to see. Yes, sir. You could not find a clear sky, sir, because of the rain. Yeah. You can find it. Yeah. I love this view. Sorry? Sir, we have the data, but if the sky is not clear, we wouldn't be able to see the star. The laser will be just pointing in that direction. So, this is basically for rural areas where you actually see an open Earth. Yes, sir. There's an option, like we said, that we will set it to... Rotate the Earth, you know. You just take a motor. No, sir. Actually, we said if we select Mumbai, then it will only show those stars that are visible from Mumbai. So, like, it won't show... If you try to select any star that's not visible from Mumbai, that this whole... This one. Sir? Sir, Mumbai will like... Mumbai person, UT is 5 per 530. This is not Mumbai. We can select. This is 0-0. We can select Mumbai. No, you take them outside. It will not work. If I take it outside, will you point to the moon? Sir, we haven't tested it yet, but we would love to do that. Sir, because of the... we couldn't find a clear sky, so we didn't test it outside. But, yeah, we would love to do it. They were the clear sky. Up to one week, it was all clear. No, sir, it went any time in Mumbai. But we didn't have any working order there. Anyway, let's go for dinner. Thank you, sir.