Star/Legends

"There are so many! Do they all have a system of planets?"

- A nine years old Anakin Skywalker, looking at the stars A star was an enormous sphere of immensely hot hydrogen and helium that underwent nuclear fusion to produce heat and light (in essence, it was a giant ball of plasma). Systems of planets would usually form around stars when the gas and dust around them became stable enough. Stars could come in all sorts of sizes, colors, and temperatures. Most planets were seen orbiting medium mass orange-yellow stars, often called suns.

It was estimated that there were four hundred billion stars in the galaxy. There were 7.1 billion habitable stars in the known galaxy, which made up about 3.2 billion habitable star systems. This means that many systems contained two or more stars. Red dwarfs accounted for approximately 70 percent of the galaxy's stars.

Characteristics
The parts of a star located above its surface were collectively referred to as the atmosphere. They comprised two principal zones: the chromosphere and the corona. The chromosphere was a gaseous, relatively cool layer located immediately above the surface, and the corona was the tenuous, rarefied gaseous outermost part of the atmosphere.

Types of stars
"Traveling through hyperspace ain't like dusting crops, boy! Without precise calculations we could fly right through a star or bounce too close to a supernova, and that'd end your trip real quick, wouldn't it?"

- Han Solo, to Luke Skywalker There are seven types of main sequence stars in the galaxy:


 * "O" stars were blue and hot, and had a lifespan of less than one million years. There were approximately one hundred million habitable O stars in the galaxy. Example: Garnib.


 * "B" stars were white-blue and hot, and had a lifespan of ten million years. There were approximately one hundred million habitable B stars in the galaxy. Example: Kessa.


 * "A" stars were white and hot, and had a lifespan of four hundred million to two billion years. There were approximately one hundred million habitable A stars in the galaxy. Example: Colu.


 * "F" stars were yellow-white and medium-temperature, and had a lifespan of four billion years. There were approximately one hundred million habitable F stars in the galaxy. Example: Ropagi.


 * "G" stars were yellow and medium-temperature, and had a lifespan of ten billion years. There were approximately two billion habitable G stars in the galaxy. Example: Corell.


 * "K" stars were orange and cool, and had a lifespan of sixty billion years. There were approximately 3.75 billion habitable K stars in the galaxy. Example: Yavin.


 * "M" stars were red and cool, and had a lifespan of approximately one hundred trillion years. They were also called red dwarfs. There were approximately seven hundred million habitable M stars in the galaxy. Example: Barab.

With O stars being the biggest in the sequence, the size decreased gradually to the smallest M stars. In addition to the main sequence stars, 10 percent of all stars in the galaxy were non-main sequence, of which five hundred million were habitable.

The non-main sequence stars include:

Pre-main sequence (smaller than M stars): Post main-sequence (bigger than O stars):
 * Brown dwarf. Example: Doornik-1142.
 * Protostar. Example: Black Bantha.
 * Red giant. Example: Sokor.
 * Blue giant. Example: Ku'Bakai.
 * Red supergiant. Example: Primus Goluud.

Compact stars:
 * White dwarf. Example: Ardos.
 * Black dwarf. Example: The star of the Ring.
 * Neutron star. Example: Din Pulsar.
 * Black hole. Example: The Maw.

Behind the scenes
The OBAFGKM sequence is the same classification system used for identifying stars from Earth. However, in terms of Earth astrophysics, certain descriptions of stars in the Galaxy Far Far Away are shaky. Scientific bloopers abound such as blue supergiants that exist for long enough for a sentient species to evolve, inexplicably large brown dwarfs or red giants that are stable enough to house a habitable planet. The existence of black dwarfs is also impossible, as the universe is only about thirteen billion years old, and those take trillions of years to form.

Appearances
Because space travel is a central part of Star Wars, stars appear in many Star Wars works. This a list of media in which stars and suns are specifically mentioned (not including common compounds like "star system", "starship", "starfighter" or "Star Destroyer", or names like "Death Star" or "Black Sun").
 * Dawn of the Jedi: Into the Void
 * Star Wars: Dawn of the Jedi: Force Storm 1
 * Star Wars: Dawn of the Jedi: Force War 3
 * Tales of the Jedi: Dark Lords of the Sith audio drama
 * Star Wars: Knights of the Old Republic 8: Flashpoint, Part 2
 * Star Wars: Knights of the Old Republic II: The Sith Lords
 * Star Wars: The Old Republic
 * Lost Tribe of the Sith: Pandemonium
 * Star Wars: Jedi Academy
 * Legacy of the Jedi
 * Star Wars Episode I: The Phantom Menace
 * Star Wars Episode I Journal: Darth Maul
 * Jedi Apprentice: The Uncertain Path
 * Star Wars Episode II: Attack of the Clones
 * Shatterpoint
 * Equipment
 * Star Wars: Republic 57: The Battle of Jabiim, Part 3
 * MedStar I: Battle Surgeons
 * MedStar II: Jedi Healer
 * Star Wars: The Clone Wars: Darth Maul: Shadow Conspiracy
 * Yoda: Dark Rendezvous
 * Star Wars: Kenobi
 * Star Wars: Dark Times 30: A Spark Remains, Part 3
 * Star Wars: Dark Times 31: A Spark Remains, Part 4
 * Star Wars: Dark Times 32: A Spark Remains, Part 5
 * Star Wars: Darth Vader and the Cry of Shadows 2
 * The Paradise Snare
 * Han Solo at Stars' End
 * The Star Wars 2
 * Star Wars Episode IV: A New Hope / novel / junior novel
 * Scoundrels
 * Star Wars 38: Riders in the Void
 * Star Wars 2: In the Shadow of Yavin, Part Two
 * Splinter of the Mind's Eye
 * Empire and Rebellion: Razor's Edge
 * Star Wars 58: Sundown!
 * Star Wars 78: Hoth Stuff!
 * Shadows of the Empire novel
 * Out of the Closet: The Assassin's Tale
 * Dark Forces: Rebel Agent audio drama
 * Dark Forces: Jedi Knight audio drama
 * Tatooine Ghost
 * The Crystal Star
 * The Unifying Force
 * Outcast
 * Out of the Closet: The Assassin's Tale
 * Dark Forces: Rebel Agent audio drama
 * Dark Forces: Jedi Knight audio drama
 * Tatooine Ghost
 * The Crystal Star
 * The Unifying Force
 * Outcast