I'm Caitlin Hofmeister and welcome to SciShow Space. As is often the case in astronomy, a seemingly simple question does not necessarily have a simple answer. For example, where does our solar system end As in where does our stellar neighborhood stop and where does the vast expanse of space start This question actually caused quite a kerfuffle in the summer of 2013 when many news outlets proclaimed that the Voyager 1 spacecraft, launched in 1977, had finally and officially left the solar system. While it's clear that Voyager has traveled farther than any humanmade thing before, it turns out you can't actually.
Say once and for all that it has crossed out of our solar system because there are different ways of deciding where our solar system actually ends. Space turns out it's pretty complicated. So there are seven other planets, many dwarf planets, countless asteroids and comets, and, of course, Earth all orbiting the Sun, and we all have one thing in common that makes us members of the coolest club in the cosmological neighbourhood our gravitational attraction to the Sun. By most thinking, just orbiting the Sun is an easy and intuitive way to define.
The Solar System and its limits. But, the Sun's gravitational attraction starts to fizzle out in part of the Solar System called the Oort cloud which is an enormous and odd collection of icy objects orbiting the Sun 150 trillion kilometers away. That's 100,000 times farther from the Sun than we are. So that must be where the Solar System ends, right Well, yes, but that's not where Voyager is. If we use the Oort cloud as our definition of the boundary, then Voyager actually has a really, really, really long way to go. It.
Won't even enter the cloud for another 300 years, and it won't pass out of it for another 30,000. By then I'll just be, like, a preserved head in a glass jar if there are glass jars. But this isn't even the threshold that got the media's knickers in a twist. Another way of defining the Solar System is not by the Sun's gravitational influence, but by the influence of its radiation. Consider what's outside the Solar System. The local interstellar medium, as it's officially known, is made up of matter gas and dust and particles that.
Hang out in the areas of space in between star systems. Now the Sun pushes this interstellar medium out of the way with a highspeed stream of charged particles called the solar wind. This stream flows in all directions from the Sun, forming a bubble called the heliosphere. The boundary of this bubble is where the solar wind can no longer overpower the outside pressure of the interstellar medium. And as the solar wind begins to interact more with the interstellar medium, it slows abruptly forming a shock wave known as the termination shock. Just.
Beyond the shock wave, the solar system kind of piles up suddenly like a driver slamming on the brakes and sending everyone flying forward. The area where this radiation bunches up is called the heliosheath. This continues until the pressures of the solar wind and the interstellar medium balance out forming the final boundary known as the heliopause. So it's through this last border, the heliopause, that Voyager crossed in August of 2013, putting the spacecraft into what one astronomer called a mixed transitional region of interstellar space. Of course, that doesn't have the same ring to it as Voyager has left the.
Building. So while we know Voyager 1 has entered interstellar space, saying it's left the Solar System is actually misleading. It still has a rough ride ahead of it through the Oort cloud and it's going to be feeling the Sun's gravitational pull for tens of thousands of years. So now you know what the experts know and you can sit back and enjoy the rest of Voyager's journey, and we'll give you an update in about 300 years. Thanks for watching this episode of SciShow Space and thank you all to our Subbable subscribers.
smanos Open Box Tutorial X300 GSMSMS Alarm System
Hello there! Welcome to our smanos tutorial channel. In this tutorial we will show you the X300 GSMSMS PlugPlay alarm system. This system doesn't need a contract and doesn't have any monthly fees. It's very easy to use with the free App and can be set up within several minutes. It works on a frequency specially made for security at 868Mhz and is expendable up to 50 sensors and 10 remote controls. Let's have a look what's inside the box. In the box we can find the X300 itself, the AC adapter, warning decals, 2 remote controls,.
A doorwindow contact with doublesided tape, a PIR motion detector with a screw kit and its documentation. Then how does the alarm system work. When a sensor has been triggered it will send a signal to the control panel. The control panel will sound the builtin siren immediately and send SMS messages to all stored phone numbers. After texting, the panel will call the stored phone numbers too. When an optional siren is installed the panel will sound this siren as well. In order to receive text notifications and calls, the X300 panel needs to have a sim card.
Keep in mind to disable the standard passcode and disable voice mail. Also keep in mind a normal size SIM card is used. So when using a nano or micro sim card, you will need an adapter to fit it in the control panel. To install the system the AC adapter can be connected in the bottom of the control panel and power can be switched on. The panel will show its LED indicators Let's have a look at the doorwindow contact. First pull the strap out of the sensor. Keep the triangles of the doorwindow contact pointed to each other.
Now we separate the magnet from the sensor and the LED indicator on the sensor will be seen. Which means it has been triggered. Installation can be done at the side of a door or window opening. Place the sensor on the side, place the magnet on the door or window itself. Make sure the triangles face each other and keep the distance within one centimeter. Then next the PIR motion detector. Again, pull the strap out of the motion detector. It will start testing for about 30 seconds. When the detector sees movement twice within three minutes the detector goes into power saving mode.
This means it will not be triggered and will not send a signal to the control panel. twice on the button at the back side of the motion detector in order to send a signal to pair the device. Installation height is best at 2.2 meters. This wil give a range of about 8 meters and 110 degrees wide. Installing the X300 can be done with the free App which is available in the App Store and Google Play. With the X300 app you have the ability to control and set up the alarm system.
At the home screen it's possible to arm, disarm and call the system by scrolling the round button. At the bottom you can find the options to set the emergency phone numbers, change sensor names, set delay time and adjust the duration and volume of the siren. That's the end on this product tutorial. I hope you enjoyed it. Feel free to follow our channel for more upcoming tutorials about our products. For more information please visit smanos or find us on Facebook and Twitter for the latest updates. Thank you for watching, see you next time!.
PaintBased Solar Cells Capture Sustainable Electricity Interview with Prof. Ted Sargent
The sun is this incredible vast resource. We get more sun reaching the Earth's surface every day than we need to power the entire world's energy needs. In fact, in an hour, we get enough to meet our energy needs for a year it's that abundant. But if you look out there and think how we actually today meet our energy needs, it's not using the sun by a large margin at all we use fossil fuels. And so my group is committed to trying to solve the technological problem that underlies that. The technological problem is not that.
We can't make efficient solar cells, it's that we can't make solar cells at the moment that are sufficiently lightweight, convenient, low in cost, and efficient simultaneously to make solar energy capture economically compelling. So we're going to reduce the cost of solar electricity. The economic impact will really be had when we can tell customers that they can get solar electricity for a lower cost than if they bought electricity off the grid that was produced through using, say, coal or nuclear. So our technology is based on making an ink that.
Can be synthesized in solution so it's a liquid, it's a paint and can be applied from the solution phase using rolltoroll processes just the way you print newspapers, but where that ink, now that it's absorbing light, is playing this dual role of absorbing sunlight and turning it into electricity efficiently. We picture a world in which solar cells are so convenient. They're on a carpet that you can roll out onto your roof, or they're on a decal that you can stick on the side of a streetcar, you can stick on your car, you can stick on your airplane wing. They're.
FirstLight Fully Integrated Solar LED Lighting
Today we're going to talk about our fully integrated solar LED lighting products. We have a bollard product category. We also offer pull mounted luminaires for area and sight light applications. We see those being used a lot for just pathways and also parking lot in some applications. What differentiates us from other lighting companies is we have a solar and AC option for some of our products. Depending on the application where it makes sense to use solar, we can do that. If not, we have an AC option as well that is on the.
DLC so it terms of product category it's bestinclass from an efficacy standpoint. And it's LED facts listed as well. We have an installation option with a ground screw which can get installs as quick as 30 minutes in the ground. From a contractor's perspective, its easy to install very easy to permit. You're not running any wires so the hardest part is basically setting the pole. You don't need any specialized tools, you don't need any specialized trade, so just general contractors can get this in the ground, costeffectively and fast for their projects.
We've been winning projects with just installation savings that have been up front immediate, so if you're looking at an AC alternative, our lights are immediately costeffective, when compared to running trenching with wires and conduit in the ground. So our end users typically consist of municipalities, universities, government institutions for pathway, park applications, where lighting is challenged to get to from the grid. It's very easy to deploy the lights, get them in the ground. Where solar lighting makes sense is areas where you have new construction or aging infrastructure. If you have to run new wire or put a spade.
How to make a walking robot at home
Hello there here is a walking robot. You have seen these tutorials but nobody has explained how to make it. Here is a step by step process of making it at home. You need a motor, high torque low speed you can use servo, but I have used the door opening mechanism of an old CD player. I cut it out, then take the pulley and rubber band out and take the big gear out. Through the big gear I pass a iron wire and glue it. Cut empty refill pieces and glue that.
With the shaft and the gear. Pass it again through its same position and another side put one more refill which will work like a bush. now bend shaft both side 90 degree and turn it again cut the extra length to make it a bicycle paddle like look. Now from the center of the shaft about 10cm make a hole and push a iron wire. Put both side two small refill pipes. Now the closest distance from the shaft is 5cm and the longest distance is 9cm. now you need another iron wire to make a leg.
Make a slot of 4.5cm like this and about 9cm away make another loop. thus you have to make two legs. You have to the leg into the mechanism like this for this I have used some pen and refills. I put the sketch pen empty there and two refills here and so that it can freely move. If you power it up you can see its freely moving. Now bend the leg little bit wider here and cut the extra length at that end you can see I make it a loop.
Now to make that feet, take again some wire loop it to make a 1cm long and then make a U of 6cm wide such you have to make two feet. Screw that feet with the leg tightly in such a way that it should stand on single a leg. You have to do with the other leg too now all that moving junctions you put some grease or Vaseline. Now you have to do walking test. power it up with an external 3V supply with thin wires and check how it is walking.
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