Alien Planet starts out with an interstellar spacecraft named Von Braun , leaving Earth's orbit .  Traveling at 20 % the speed of light , it reaches Darwin IV in 42 years .  Upon reaching orbit , it deploys the Darwin Reconnaissance Orbiter , Which looks for potential landing sites for the probes .  The first probe , Balboa , explodes along with its lifting body transport during entry , because one of its wings failed to unfold .  Two backup probes , Leonardo da Vinci and Isaac Newton , successfully land on the planet , and learn much about its bizarre indigenous lifeforms , including an apparently sapient species .  The robotic probes sent out to research on Darwin IV are called Horus Probes .  Each Horus probe consists of an { { convert } } long inflatable , hydrogen-filled balloon , Which is covered with solar receptors , a computer ` brain ' , a ` head ' covered with sensors , and several smaller robots that can be sent to places too dangerous for the probes themselves .  The probes have a limited degree of artificial intelligence , very similar to the ` processing power ' of a 4-year-old .  All the real thinking is done by a supercomputer in the orbiting Von Braun .  The probes are programmed with different personalities ; Ike is more cautious , while Leo is the risk-taker .  The two probes are also equipped with a holographic message that will be projected to any sentient life found on Darwin .  After the two probes inflate their gas-bags , they encounter a voracious Arrowtongue and watch it pursue a Gyrosprinter . 

Compare the computing power of the probes with the computing power of the Van Braun spacecraft.


A married couple and their three young adult children , a son and two daughters , live in a large compound with a garden and a swimming pool .  A tall fence surrounds the property and the children have never been on the other side of it , for their parents have kept them unaware of the outside world , even of the existence of the telephone .  They are taught different meanings for everyday words .  For example , they are told that a `` zombie '' is `` a small yellow flower , '' and that `` sea '' is a chair .  The parents promise that each child will be ready to venture outside the compound once she or he has lost a dogtooth .  Although the children are told they have a brother just on the other side of the barrier , he never appears .  The only non-family member to come into the house is Christina , a young woman who works as a security guard at the father's factory .  She is driven by the father to the compound traveling both ways blindfolded where she performs sexual favors for the son .  Dissatisfied with his preference for intercourse , Christina seeks oral sex from the elder daughter in exchange for a headband.  The elder daughter obliges but does not recognize the significance of performing cunnilingus .  Later , she gives the headband to her younger sister , in exchange for being licked on the shoulder , Which is marked by an unexplained scar .  The parents have tricked the children into believing that overhead planes are merely toys .  They allow the children to search for toy planes that they have planted on the grounds , and the child that finds the toy owns it . 

How many people does the headband belong to over the course of the story?


{ { Plot } } Tom plays pool in a deserted pool hall , pocketing two balls by lowdown means and then wakes Jerry up by shooting the 10-ball into the pocket where he is sleeping .  Jerry awakes just in time to avoid the 10-ball and is carried out to the ball return , where the 10 and the 13 smash the mouse between each other .  Jerry is mad and walks up through the pocket , first sees nothing , but after a few steps back to the pocket , he spots Tom perched behind it .  Jerry tries to jump into another corner pocket , but Tom aims a cue ball with so much force that it roll's into the pocket , and spins back out of it and it rolls Jerry backwards to Tom , who has made a ramp with his cue stick for the mouse to slide up .  Jerry stops at the top of the stick and is then blown down by Tom , who then shoots a stream of balls to make the mouse flat .  The whole train rebounds back towards the cat and the balls stack up at Tom's end of the table .  Tom shoots all the balls in succession with his cue , and then tries to shoot Jerry , but the mouse hangs onto the cue tip .  The cat , as if he were saying `` Have it your way '' , chalks up and shoots the 8-ball using Jerry .  The mouse drops off the cue tip and then is upended by the 8-ball rolling in circles , and Tom forces Jerry to jump through the ball rack as if he were a circus performer .  Tom then sets it on fire to add an additional level of torment , and when Jerry accomplishes this with poise , Tom discards the flaming rack and shoots the 8-ball across the table and back . 


Why is Jerry mad?