http___metro-portal.hr_fantasticna-slika-saturna_62880_1.xml
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This is what an artist thinks Cassini might look like when it uses its rocket engine to slow down and go into orbit around Saturn. Click on image for full size Image courtesy NASA/JPL. Cassini arrives at Saturn News story originally written on June 30, 2004 A spacecraft named Cassini will get to Saturn on June 30, 2004. Cassini's rocket engine will burn for 96 minutes to slow the robot spaceship down. If it works, Cassini will be captured into orbit around Saturn. Cassini was launched in 1997, so it has taken nearly seven years to complete its long journey to Saturn. Cassini will orbit Saturn for at least four years. It will use its 12 instruments to study Saturn, its rings, and its moons. Cassini is also carrying a smaller probe named Huygens. Huygens will land on Titan, Saturn's largest moon, in January 2005. Cassini will get its closest views of its entire mission of Saturn and of Saturn's rings during this first swing by the planet. In fact, Cassini will pass through the rings twice while braking into orbit. Cassini will turn its main antenna dish forward when it passes through the ring, to act as a shield against high-speed collisions with ring particles. Shop Windows to the Universe Science Store! Our online store includes fun classroom activities for you and your students. Issues of NESTA's quarterly journal, The Earth Scientist are also full of classroom activities on different topics in Earth and space science! You might also be interested in: A spacecraft named Cassini will study the planet Saturn for several years. Cassini blasted off from Earth in October 1997. After flying past Venus, Earth, and Jupiter, Cassini finally arrived at Saturn...more Cassini is on its way to Saturn. It will take Cassini over 6 years to get to Saturn. Cassini was launched on a Titan rocket early in the morning on October 15, 1997. The Cassini probe is one of the biggest...more Many people like Saturn's rings. Although Saturn isn't the only planet with rings, it is the only planet famous for them. Almost every image or drawing of the planet has the rings included. But few people...more NASA's Cassini spacecraft is in orbit around the planet Saturn. Cassini carried a landing probe, named Huygens, with it on its long journey from Earth. On December 24, 2004, Cassini released the Huygens...more The Cassini spaceship flew by Saturn's moon Titan on October 26, 2004. Titan is Saturn's largest moon, and has the thickest atmosphere of any moon in our Solar System. Cassini took some great pictures...more NASA’s rover, named Spirit, has successfully landed and will soon be scouting the surface of Mars for interesting geology! Scientists are interested to know whether the depression where Spirit landed...more NASA announced in January 2004 that it would cancel the last planned mission to the Hubble Space Telescope (HST). The head of NASA, Sean O'Keefe, believes a mission to Hubble would be too dangerous for...more
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Fantastična slika Saturna Pred par dana s Cassinija je stigla serija fantastičnih fotografija Saturna snimljenih u trenutku kad je Saturn bio između Sunca i letjelice Cassini je NASA-ina letjelica poslana 1997. godine u istraživanje Saturna, njegovih prstenova i satelita. Ime je dobila po francuskom astronomu Giovanniju Domenicu Cassiniju. Letjelica je do cilja stigla 1. srpnja 2004. Letjelica Cassini je nakon dolaska do Saturna nastavila letjeti oko njegovih prirodnih satelita i još će nekoliko puta proletjeti pokraj Titana. Cassini sa Zemljom razgovara putem triju antena. Podatcima treba od 68 do 84 minute da stignu do Zemlje. Za razliku od drugih letjelica koje koriste solarne ćelije, Cassini kao izvor energije koristi radio-izotopni termoelektrični generator koji pretvara toplinu u električnu energiju. Tri su generatora na Cassiniju ukupne snage 700 Watta. Letjelica ima dva glavna motora i čak šesnaest manjih koji izvode precizne promjene smjera. Da bi stigao do Saturna, morao je koristiti "gravitacijsku praćku" Venere (2 puta), Zemlje i Jupitera. Računalo na Cassiniju je vrlo složeno i može u slučaju prekida veze sa Zemljom čak četiri tjedna samostalno održavati letjelicu, a računalo može preživjeti i izboje Sunčevih baklji. Pred par dana s Cassinija je stigla serija fantastičnih fotografija Saturna snimljenih u trenutku kad je Saturn bio između Sunca i letjelice. Mala svijetla točka lijevo od Saturna, pri vrhu prstenova je Zemlja.