Alderaan was the home planet of Leia Organa. It is Earth like in almost every way from it's axis tilt to it's terrain.
Bespin
Bespin is a gas giant world. Cloud City is a city suspended around Bespin using anti gravity pods. Bespin's main resource is it's tibanna gas which is used as hyperdrive coolant. Bespin has 2 moons and 12 hour days and orbits it's sun every 14 Earth years
Cato Neimoidia
Cato Neimoidia is the planet where Plo Koon was above before his space ship was shot down. It is a bridge world and was under the patrol of Jedi Master Plo Koon.
Dagobah
Dagobah is the exile world of Jedi Grand Master Yoda. Yoda lived by a cave with much dark force energy and avoided detection by Darth Sidious. Luke Skywalker came here to train under Master Yodas guidance. Yoda died on Dagobah of old age after talking to Luke Skywalker.
Endor
Endor is not actually a planet but a forest moon. It is a very important place in the Star Wars universe because it is where the shield generator for the second Death Star is. With the help of the native race of Ewoks on Endor the Rebels took out the shield generator.
Felucia
Felucia is a very interesting world. It is a bog world with massive fungus like organisms. Felucia is a planet with translucent plants and animals. Once the light shines on Felucia the world shines like a multi coloured light bulb. Aayla Secura was shot on Felucia by the clone troopers after order 66 was called in.
Iego
Iego is a planet inside a nebula. The nebula bombards the planet with toxic rays. If someone stayed on the planet without visual protection blindness would occur within a few days.
Kashyyyk
Kashyyyk is the native planet of the Wookies. Yoda traveled here to help the Wookies in their time of need and almost got killed on Kashyyyk because of order 66.
Mustafar
Mustafar is a planet made of lava. Anakin Skywalker and Obi-Wan Kenobi duel here in Episode three Revenge of the Sith. Anakin gets both his legs cut off and his hand and ends up laying in lava due to Obi-Wan. there is a mining facility there.
Naboo
Naboo is a planet whos main races are Humans and Gungans. The Gungans live in underground cities. Naboo is the home planet of Padme Amidala and Jar Jar Binks. It was blockaded by the Trade Federation in episode 1.
Ord Mantell
Ord Mantell is a scrap heap planet home to every illegal activities like murders and robberies. It's atmopsphere is yellow and it has a blue green tinge on the planet. The planet hosts a race called the Blockade Runners Derby in which Han Solo has won 3 times.
Rattatak
Rattatak is a red planet whos population was controlled by fierce warlords. Death was a natural occurence on this planet.
Subterrel
Subterrel is a planet near by Polis Massa. It is a mining planet and the Kaminioans made clones to mine the planet.
Tund
Tund is a planet whereb the Sorcerors of Tund come from. The Sorcerors are Force sensitive and thats how they create their magic.
Yavin
Yavin is a red gas giant known for it's moon Yavin 4. It is filled with corsuca gems.
Ansion
Ansion is visited by Anakin Skywalker and Obi-Wan Kenobi to settle the dispute of them possibly joining the Separatist Movement. It is a grassland world.
Boz Pity
Boz Pity is a cemetery world(whatever that means). It is not very good looking so not somewhere you want to go on a vacation. Obi-Wan Kenobi saw Asajj Ventress here in a bacta tank barely alive.
Coruscant
Coruscant is the governing world in Star Wars. It's coordinates are 0,0,0 and it crosses many trade routes.
Dantooine
Dantooine is a very wet world and was going to be used as a ruse to fool Grand Moff Tarkin into thinking that the rebel base was there. Grand Moff Tarkin decided to shoot the Death Stars laser at Alderaan for political and social reasons like how it was Leia Organas home planet.
Geonosis
Geonosis is a desert world. The planets native race was a bug like race that could fly called Geonosians. Jango Fett was killed on Geonosis.
Hoth
Hoth is an icy planet with it's native creatures being wampas and tauntauns. It is home to the Rebel base which is called Echo Base. It gets destroyed in episode 5. It also has 3 moons
Kamino
Kamino is an ocean world. There is a race on this planet called Kaminoans and they are known for their cloning technology. Obi-Wan Kenobi tracked the poison from the poison dart to here. There he found out about the clones and their maker Jango Fett and his son Bobba Fett.
Malastare
Malastare is the world where the species called the Dugs are from. The Dugs were oppresed by the three eyed goat like creatures called Gran. Malastare was a supporter of the trade federation. It also is dense and swampy and has 2 moons.
Mygeeto
Mygeeto is an icy planet which is held by the Intergalactic Banking Clan. Ki-Adi-Mundi was killed here after order 66 was issued.
Nar Shaddaa
Nar Shaddaa is the largest moon of Nal Hutta and is known as the smugglers moon because it is where most of the smugglers go.
Polis Massa
Polis Massa iw the birth planet of Luke Skywalker and Princess Leia Organa. It was a normal planets till a mysterious cataclysm happened and destroyed the world turning it into a bunch of asteroids. It is a mining planet.
Saleucami
Saleucami is a desert planet but filled with large bulb like plants. Order 66 occured on this planet.
Tatooine
Tatooine is a desert planet and home to Luke Skywalker. The planet was controlled by the Hutts. It's native species were the Bantha, Dewback, Tatooine Howlers, Eopies, Krayt Dragons, Rontos, Sarlacc, Scurriers, Womp Rats, Wraids and Worrts.
Utapau
Utapau is where Obi-Wan Kenobi battled General Griveous. It is filled with massive sinkholes where whole cities would be built in the crevases in the sides of the sinkholes.
Yavin 4
Yavin 4 is a moon of Yavin. It is home to the main rebel base founded in ancient ruins. To save Yavin the Rebels sent 22 X-wing and 8 Y-wing and only 3 came back alive Like Skywalker, Wedge Antilles and an unamed Y-wing pilot. Luke saved the rebels by firing a proton torpedo into an exhaust pipe on the Death Star destroying it. There was a cermony held on Yavin4 to commerate Luke Skywalker and Han Solos actions.