this question came from Kira who at age 4 and a half wanted to build a billion story building actually it came from Kira's dad who wanted to help Kira appreciate how big and difficult such a project would be Kira if you make a building Too Tall the top part is heavy and it squishes the bottom part until you make it really tall and then the top part will tear itself off and go into orbit near the moon but we're getting ahead of ourselves have you ever tried to make a tower out of jello it's easy
to make a little tiny wobbly Jello Castle in fact some people like to serve fancy Jello-O that way but if you try to make a really big jello Castle the whole thing smooshes down on itself the same thing happens with buildings eventually the buildings we make are strong the tallest are almost a kilm tall and we could probably make buildings two or even 3 km tall if we wanted and they would still be able to stand up under their own weight but too much higher and we'd run into the jello problem the top part would
squish the bottom part there are other problems with tall buildings too one is wind the wind up high is very strong and buildings have to be very strong to Stand Up Against the Wind another problem is surprisingly elevators tall buildings need elevators since no one wants to climb hundreds of flights of stairs if your building has lots of floors you need lots of different elevators to get all the people where they're trying to go at once some of our existing tall buildings have floors purely dedicated to letting people change from one elevator to another if
you make a building Too Tall the whole thing gets taken up by elevators and there's no space for regular rooms another big problem is money a building several miles tall would cost many billions of dollars and most people don't think giant Towers a few miles tall are important enough to spend billions of dollars on even if you found a lot of money you'd still have problems making a tower a billion stories tall a billion stories is just too many a big skysc Creber might have about 100 Floors which means it's as tall as 100 little
houses if you stacked 100 skyscrapers on each other to make a mega skyscraper it would reach halfway to space this skyscraper would still only have 10,000 floors which is way less than your billion floors so let's stack 100 Mega skyscrapers to make a mega mega Skyscraper the mega mega skyscraper would stick out so far from Earth that spacecraft would crash into it some like the International Space Station could steer around it but space is full of broken satellites and pieces of junk all flying around at random some of which will eventually smash into your mega
mega skyscraper at very high speeds and anyway a mega mega skyscraper is only a million floors High that's still a lot smaller than the billion that you want so let's Stack Up 100 mega mega skyscrapers to make a mega mega mega Skyscraper the mega mega mega skyscraper would be so tall the top of it would just barely brush against the moon and it would introduce a new problem centrifugal forces just like how a swing Carousel throws you outward anything spinning in syn with the earth's equator is thrown outward on the surface objects literally weigh about
half a%c less at the earth's equator than at the poles the F farther out you go the weaker Earth's gravity gets and the stronger the cical forces the effects are equal at just over a tenth of the way to the Moon if you build a Skys scripper This Tall you could launch a geostationary satellite just by letting go of it out the window but our mega mega mega skyscraper is so much taller than geostationary orbit that most of its mass is where the outward pulling centrifical force is much much stronger than Gravity the engineering challenge
of this skysper isn't that it'll collapse down on itself like jello but that it'll tear itself up by the roots and go into orbit near the moon and it still wouldn't be a billion stories to get there we'd have to stack 10 mega mega mega skyscrapers on top of each other to make one Cura skyscraper at the top the cura skyscraper would be going faster than the speed with which the solar system orbits the Milky Way and if you timed things right you could launch a satellite with almost enough velocity to leave our galaxy just
by letting go of it out your window suffice it to say the Curious skysc would be pretty close to impossible to build and any loose pieces would fly off and get strewn throughout the Galaxy but the view from the roof would be incredible
