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"The strongest stars have hearts of kyber."
Chirrut Îmwe[1]

A star being drained to power the Starkiller Base superweapon.

Stars were massive, glowing, spheres of plasma and gas that produced their own light and energy. Stars that were the central body of a planetary system were referred to as suns.


"When I served under Leia... She would say that hope is like the sun. If you only believe in it when you can see it-"
"You'll never make it through the night."
Amilyn Holdo and Poe Dameron[2]

The star Kessa

Stars were large celestial bodies that generated heat, light and radiation and consisted of a mass of burning plasma and gas.[3] Resistance member Karé Kun once referred to them as "giant balls of exploding gas."[4] During the High Republic Era, stars were assigned to a specific class by their chemical properties, such as R-class stars being unusually nitrogen-heavy.[5]

Types of stars[]

There were seven types of main sequence stars in the galaxy:[6]

  • "O" stars were blue, and had a lifespan of less than one million years. Example: Garnib.[6]
  • "B" stars were blue-white, and had a lifespan of ten million years. Example: Kessa.[6]
  • "A" stars were white, and had a lifespan of four hundred million to two billion years. Example: Colu.[6]
  • "F" stars were yellow-white, and had a lifespan of four billion years. Example: Ropagi.[6]
  • "G" stars were yellow, and had a lifespan of ten billion years. Example: Corell.[6]
  • "K" stars were orange, and had a lifespan of sixty billion years. Example: Yavin.[6]
  • "M" stars were red and emitted little light or heat. They had a lifespan of over one hundred trillion years. They were also called red dwarfs. Example: Barab.[6]

With O-class stars being the biggest in the sequence, the size decreased gradually to the smallest M-class stars.[6]

The non-main sequence stars include:[6]

Pre-main sequence (smaller than M-class stars):[6]

Post main-sequence (bigger than O-class stars):[6]

Compact stars:[6]

Other exotic star types existed that did not fit precisely into this system of classification. These included Asar, considered a blue dwarf,[7] and yellow dwarfs.[8]


Stars formed in areas of space known as stellar nurseries,[9] through a collision of energies in the form of pressure and heat, a process which shaped the space around it and could be seen from millions of kilometers away.[10] The ignition of a planet's core by an outside force could also result in the formation of a star.[11] After their birth, stars went through various stages during their life, such as a yellow dwarf expanding to become a red giant.[8] Plants drew sustenance from sunlight.[12]

Stars and planets[]

A field of stars

"There are so many! Do they all have a system of planets?"
"Most of them."
Anakin Skywalker and Jedi Master Qui-Gon Jinn, looking at the stars[13]

Most stars were orbited by a set of planets and other bodies.[13] In that case, they were referred to as suns. A sun, together with all the bodies bound to it, formed a planetary system. In some cases, a planetary system could contain several suns, as was the case around the planets of Tatooine[14] and Mon Cala.[15]

A planet revolving around a star normally received light and warmth from it,[8] although there were exceptions. Umbara was known as the "Shadow World" because the rays of its sun never completely reached the planet's surface, keeping it in perpetual darkness.[16] In the night sky, remote stars looked like mere points of light.[13] By convention, those points of light were grouped into constellations.[17] Without a star, most worlds would become lifeless and frozen. The size and distance of a sun would affect many of the features of a planet orbiting it.[18]

On the planet Coruscant, stars were hard to see, due to all the city lights of the sprawling ecumenopolis. However, according to young Obi-Wan Kenobi, one could see them if they knew how to look. Stars could be used for navigation: When young Kenobi returned to the Jedi Temple after trying to help fellow Jedi Initiate Gehren Rand, who had run away, he used the stars to find his way home.[19]


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Non-canon appearances[]


Notes and references[]

External links[]