Terrio describes Rey's journey to Tatooine as a pilgrimage honoring the Skywalker family heritage, saying: “Rey brings the sabers there to honor the Skywalker twins by laying them to rest—together, finally—where it all began.
She wielded it in defeating Kylo Ren, then brought it to Ahch-To and offered it back to Luke. When he refused it, Rey carried the ancient weapon herself. The lightsaber sheared apart when Rey and Kylo struggled for possession of it aboard the Supremacy, but Rey reforged it as she continued her Jedi training.
After defeating her grandfather, Emperor Palpatine, and ending the Sith threat (at least for now), Rey journeys to Tatooine. There, outside Luke's childhood home, she buries his and Leia's lightsabers, before igniting her own, crafted from the staff we first saw her wield on Jakku.
This explains why Rey could hear the lightsaber "calling" to her in Star Wars: The Force Awakens; she was destined to join herself to the same Skywalker legacy, and thus she was sensing echoes of Anakin and Luke beckoning her to them.
In the aftermath of the Battle of Exegol, Rey buried the famed lightsaber alongside Leia Organa's lightsaber, on Tatooine, the desert homeworld of Anakin and Luke.
There, Rey unveiled her finished, single-bladed weapon after burying the two lightsabers of her mentors, Luke Skywalker and Leia Organa, at the ruins of the Lars homestead—the former place of residence of the Skywalker family.
Luke Skywalker's lightsaber was changed from blue to green when they were filming because it was difficult to see. This became apparent during act one of Return of the Jedi when the battle on Jabba the Hutt's sail barge was shot during the day. The blue lightsaber blended in with the clear blue sky.
In The Last Jedi, during Rey and Kylo Ren's confrontation in Snoke's throne room, Luke's original lightsaber was split in half, and as shown later on in the movie, the crystal had been divided too, but in The Rise of Skywalker, which takes place one year after the previous movie, Rey is shown to have rebuilt it.
This can be seen in the novel starwars.wikia.com/wiki/Rogue_Planet. It's because of his mastery of sorsue (sorry for my bad spelling.) Well if you want the ACTUAL reason it because in the original 3 films the Green Light Sabre didn't exist until after Obi Wans death.
Leia had an unexpected child, Rey, which she hid on Jakku after seeing a vision of the new jedi orders destruction which she tried to prevent by hiding Rey. Making Rey Sidious "great granddaughter" or "daughter", as Anakin was his "son".
It's possible that Rey adopted the yellow-bladed lightsaber (or perhaps the kyber crystal conjured a yellow blade based on the changes within its wielder) in honor of those emotionally detached sentinels tasked with guarding the Jedi Order.
A crystal embodies the Jedi as the heart of the lightsaber, and pure kyber has no color until it's bonded to the Force user. This process likely resulted in Rey Skywalker's lightsaber being yellow.
Whereas Obi-Wan buried both Anakin's and his own lightsaber, Rey buried Luke's and Leia's while creating a new one for herself. She lived in a different era, when Jedi light was re-emerging and she had nothing to fear. Her decision to bury Luke and Leia's lightsabers was an attempt to give them a new legacy.
There's no particular indication that she knows who Darth Vader is or how powerful he was, other than what she's pulled out of Ren's thoughts.
As I mentioned, Rey buries Luke and Leia's twin sabers in the sand and then she gets out something new: her own lightsaber with a gleaming golden blade. Up until now, Rey has mostly been using Anakin's old blue lightsaber—just as Luke did for a time before her.
Ray is not more powerful than Anakin. Anakin is the chosen one, confirmed here: Everything Rey did in The Rise of Skywalker, still doesn't match Anakin's power in this moment. Those two beings in the video above are Eternals, they are beyond the powers of mortal Force users.
Many believe he destroyed it after sinking the X-Wing on Ahch-To as he denounced the force, and that the crystal he wears around his neck is actually the Kyber crystal from this lightsaber. This will probably be explored over the next couple of years as Star Wars 9 nears completion.
The main reason for the change was that during the filming of Return of the Jedi, the crew realized that the blue saber did not look right during the battle with Jabba the Hutt. When shot in daylight, the blue would blend with the color of the sky, so George Lucas and his crew decided to make the change.
Yoda's lightsaber was one of the personal lightsabers of Yoda, the last Grand Master of the Jedi High Council. In keeping with its owner's stature, the green-bladed weapon had a shorter hilt and shorter blade, making it a shoto.
Leia's lightsaber was a blue-bladed lightsaber used by Princess Leia Organa during her time as a Jedi Padawan training under her brother Jedi Knight Luke Skywalker.
Following Palpatine's final defeat and her own resurrection, Rey adopts the name Rey Skywalker to honor her mentors and their family legacy and renounce her lineage. As the last remaining Jedi, she makes it her mission to rebuild the Jedi Order.
Rey uses the connection of the Force dyad to pass Anakin's saber to Ben, while igniting Leia's for herself. When Rey is left alone for the final stretch of the duel against Palpatine, she wields both Anakin's and Leia's blades to repel the Force lightning of Sidious, extinguishing him once and for all.
Yoda claims to have been training Jedi for 800 years. The second time Yoda mentions his long life is in Return of the Jedi, when he tells Luke, “When you reach 900 years old, you will not look as good as you will.” If we take Yoda at his word, that means the Jedi Master died at the ripe old age of 900.
Without a doubt, the most notable Jedi with a purple saber is Mace Windu, portrayed in the prequel trilogy by Samuel L. Jackson. Audiences first got a glimpse of the unusual blade in Episode II: Attack of the Clones, making Windu the coolest Jedi in one cinematic moment.
When the Dark Lord used Force lightning to disarm him, Yoda lost the lightsaber, which fell to the ground below, but he recovered the weapon, and kept it in a box in his hut on Dagobah while in his exile.