stored in the air molecules which is later shown as a light so if your eye was more sensitive you could see a flash of light going to be strong in another flash another from because our eyes are not sensitive enough we need to use so-called fluorescent detectors which take a movie of the sky very very fast move your discovery. and. esther physicist bronchial art shows us one of the fluorescence detectors. there are four buildings like this one on the observatory site. ok we just arrived here at the fluorescent. call mostly only. if you look at least
pier observatory. all of them are filled with water. the detective covers an area of fifty by sixty kilometers it s the largest observatory ever built. when cosmic rays reach the earth s surface here they are registered by the water tanks a single cosmic ray can produce a particle shalah that stretches over several square kilometers and a small tenuously detected by different containers. but it s not the only way how we can figure out the showers are actually. one of the particles go for the atmosphere excited. to have this energy stored in the air molecules which is later shown as a light so if your eye was more sensitive you could see a flash of light going through the sky in another flash another from because our
water and i thought this was a much more interesting pay load than water. and lastly, space is very large, endless area there, but all of space junk, does it create a problem at all? is there a limit to how much we should put out there and up there are? is there any interest in cleaning it up or just because it s space you just leave it? well, in lower earth orbit there s enough atmosphere up there, enough air molecules that it will slow things down and they will eventually come down and so, yeah, we keep putting up more spacecraft and pieces up there but they are coming down. it is a problem and it s a growing problem because ear launching more and more satellites. the push now is to these nano sats that are going to go up big constellations in lower orbit. we re adding a lot more stuff in the coming years and it is a concern. there s no question about it. all right. word for the day, spacecraft. it s hyphenated.
a natural lightning discharge of several hundred million volts that sounds paltry but the mechanisms which lead to the discharges are identical theer to the high voltage ionizers the air molecules creating channels that are conductive theft alone the resulting discharge is flashed around in chaotic zigzag paths for now the scientists in geneva want to guide the lightning to where they wanted to go through what is really amazing with. the intensity is very high so when you travel through the year. the year molecules and you get a lot of electric charge a little bit like a wire electric wire and so you get this wire if you ve got the earth it will channel the electricity through it and then you can really guide. and experiment shows what happens. without
a natural lightning discharge of several hundred million volts that sounds paltry but the mechanisms which lead to the discharges are identical theer to the high voltage ionizers the air molecules creating channels that are conductive feel left alone the resulting discharge is flashed around in chaotic zigzag paths for now the scientists in geneva want to guide the lightning to where they wanted to go for what is really amazing with these new laser intensity is very high so when you travel through the year. the year molecules and you get a lot of electric charge a little bit like a wire electric wire and so you get this wire if you connect the earth it will channel the electricity through it and then you can really guide. and experiment shows what happens for without