That was when he saw a vision of one of Vader's dreams, including an older version of the unburnt Anakin with Padmé and Luke. That was when Palpatine was able to piece together the puzzle and found out that Luke was the son of Anakin Skywalker.
It is true that Palpatine knew about Anakin's and Padmé's marriage and that she became pregnant, but Palpatine didn't know that Padmé successfully had the twins before dying.
In this comic issue, Darth Vader is informed by Boba Fett that the Rebel pilot who destroyed the battle station (and briefly battled Vader on Cymoon 1 in issue 2) is named Luke Skywalker, who Vader immediately recognizes as his son.
In the Star Wars original trilogy, Luke Skywalker did not know that Darth Vader was his father before he met Jedi Master Yoda on the planet Dagobah. Yoda reveals to Luke that Vader is his father in the movie "The Empire Strikes Back" while Luke was undergoing Jedi training on Dagobah.
Vader didn't assume he was his son because there were plenty of people out there in the universe who could have been Force-sensitive. However, by the time the Battle of Hoth (ESB) had happened, Luke's name had spread all over the galaxy and the Emperor knew of it and told Vader.
During the iconic opening moments of Star Wars: A New Hope, Darth Vader has a tense confrontation with Princess Leia, an adversary who, unknown to him, is actually his daughter. Despite participating in Leia's interrogation, the Sith Lord doesn't uncover his familial connection with the rebellious royal.
George Lucas didn't plan on making Darth Vader the secret father of Luke Skywalker. As much as fans have been told that Lucas had a massive plan for the Star Wars saga prior to 1977, the sources closest to that process say the opposite.
Yoda didn't specifically know how this would go down, or to what degree Anakin would cause it to happen, but he was playing a much longer game by Revenge of the Sith, and that's at least, in part, explained by Yoda's Force connection with Qui-Gon's spirit.
Master Yoda has risen above all others to claim the top spot as the most powerful Jedi of all time and the true chosen one according to IGN's audience. He won pretty handily as well, as he was victorious in 89,756 of his 95,243 battles and had a win percentage of 94.2%.
Darth Vader didn't learn he had a daughter until Return of the Jedi, when he stood before Emperor Palpatine. The Emperor's power probed Luke's mind, attempting to goad him to fall to the dark side, and he discovered Leia's existence. "Sister," the Emperor taunted.
And during the conversation, Padme is holding her stomach and appears to have a bump, seemingly confirming she was pregnant long before Revenge of the Sith. However, she chose not to tell Anakin, presumably because he was about to go into a battle.
The answer is two-fold: Obi-Wan flatly tells Luke that he has a twin sister, when Luke asks him who Yoda was referring to when he said that there is another Skywalker. Luke's own Force-enhanced intuition then reveals to him who the identity of the twin sister is: Leia.
A Skywalker by blood, Leia Organa is known to be Force sensitive. Is she showing those abilities in the new Star Wars miniseries? "I am inside your mind." These are the first words that the phony Jedi Haja Estree speaks in the second episode of Obi-Wan Kenobi, pretending to read the thoughts of a customer he's conning.
In The Phantom Menace, when Qui-Gon Jinn meets tiny Anakin Skywalker and his mother, he goes on about how the Force is like, crazy strong with Anakin or whatever, and then asks his mother about Anakin's dad. Shmi Skywalker is pretty clear in her answer: There isn't a father. She was impregnated by the Force.
The Emperor is Officially Anakin's 'Father'
Yes, Star Wars fans, Darth Vader #25 confirms that Anakin Skywalker was the result of Dark Side/Midi-chlorian manipulation inside of Shmi Skywalker's womb - performed personally by Emperor Palpatine.
Is it ever confirmed when and how Palpatine learned that Anakin and Padmé were married? It is clear that he knows about it by the time of ROTS, where he exploits Anakin's concern about Padmé's potential death in childbirth to turn him to the dark side.
Within the Star Wars Legends continuity, Yoda's Jedi instructor was N'Kata Del Gormo, a Hysalrian Jedi Master, according to an in-universe legend.
But one Jedi stands above the rest and needs to start getting recognized as the greatest Jedi who ever lived. That is none other than Obi-Wan Kenobi. While this saga is ultimately the story of the Skywalkers, Obi-Wan is arguably the best and most pure Jedi to ever come out of it.
The canonical comic Star Wars: Darth Vader #7 confirms the younglings' deaths caused Anakin grief, self-loathing, hatred and pain, fueling his descent even further into the dark side. Those negative emotions also power the dark side, meaning Anakin likely felt stronger as he killed the younglings.
Wait, Did Yoda & Windu Know About Anakin's Secret Relationship With Padme? It's possible that Jedi Masters Yoda and Mace Windu always knew about Anakin Skywalker's secret relationship with Padmé Amidala, and one particular Star Wars: The Clone Wars episode provides proof.
Yoda was reluctant to train Anakin in Episode II because he said Anakin was too old to start training (even though Anakin was still a boy). However, in Episode V, Yoda didn't seem very reluctant to train Luke despite the fact that Luke was a full grown man by that time.
R2-D2 was in on the scheme to keep the secret away from Luke and Leia. He was devoted to the Skywalker family, and at the guidance of Obi-wan and Yoda, he would have maintained that secret in order to help protect the twins.
R2-D2 was present when Padmé gave birth to Leia and Luke, so he knew Luke was Anakin's son – but what he didn't know was that Anakin became Darth Vader. In addition to that, Anakin's fall was surely a painful event in R2-D2's life, one that he definitely wouldn't like to remember or even talk about.
A popular Star Wars theory suggests that Anakin Skywalker becoming Darth Vader was necessary to bring balance, but Star Wars has debunked this idea. A longtime Star Wars theory suggests that Anakin Skywalker was always destined to become Darth Vader, but the franchise has debunked this idea.