The Bantha milk is the beverage of choice that Luke Skywalker's aunt famously served around the dinner table on Tatooine in "Star Wars."
Kyber crystals are used to create lightsabers.
According to the tie-in novel "Star Wars: Catalyst," small ones are used to power lightsabers while larger ones decorated Jedi temples. At this point in the "Star Wars" universe, all of the Jedi have either been wiped out or are in hiding.
They also have an effect on people's dreams. We see Jyn wake from a dream with her parents and Krennic while young. When she wakes, she's clutching onto her crystal necklace.
In "Rogue One," Galen Erso (Mads Mikkelsen) uses the crystals as fuel to power the Death Star.
When Director Krennic goes to retrieve Galen Erso to work on the Death Star, he tells him the Empire is close to providing peace and security for the galaxy.
He refers to them as heroes of the Empire.
This is similar to what Anakin Skywalker says in "Episode III: Revenge of the Sith" during his final confrontation with Obi-Wan Kenobi.
Before their big battle on Mustafar, Skywalker tells his old master that he sees through the lies of the Jedi.
"I do not fear the dark side as you do," says Skywalker. "I have brought peace, freedom, justice, and security to my new Empire."
It appears as if this phrase was the foundation for what Anakin Skywalker/Darth Vader used to convinced others to rally behind him in the Empire.
If that seems familiar, it should. We were first introduced to it in 1977's "Star Wars."
The Rebel HQ was later relocated to Hoth.
When the film heads to the rebel base on Yavin 4, we see a familiar shot as a ship soars across the sky.
Jimmy Smits reprises his role as Bail Organa, Princess Leia's adoptive parent.
Did you recognize Organa at the rebel base? We last saw him in "Star Wars: Episode III - Revenge of the Sith" when Obi-Wan Kenobi left a young Leia in his possession.
The original actor, Peter Cushing, passed away in 1994. In the prequel movies, Wayne Pygram played the character with prosthetics.
Those weren't any two strangers. They were Evazan and Ponda Baba from the Cantina scene in "Star Wars."
Evazan tells the two to watch themselves before Ponda Baba settles him down.
It's not clear how they got off of Jedha before it was blown up, but soon after, the two would get into a squabble with Luke Skywalker and Obi-Wan Kenobi. How far is Tatooine from Jedha anyway?
The two-legged All Terrain Scout Transport vehicles were first introduced in "The Empire Strikes Back" and were later in "Return of the Jedi."
Chirrut Imwe (Donnie Yen) and Baze Malbus (Jiang Wen) are "Guardians of the Whills."
Fans know Whills is a reference to "Star Wars" creator George Lucas' first scripts for "Star Wars." They were called "Journal of the Whills."
Members in Saw Gerrera's hideout are seen playing Dejarik, a popular holographic game in the "Star Wars" universe.
Instead of holograms, this version has carved figures.
We first saw the game aboard the Millennium Falcon in "Star Wars."
It recently appeared in "The Force Awakens" as well.
You can read more on the Dejarik table here.
When Jyn is taken to Saw Gerrera's hideout, he cries out the famous, "It's a trap!"
When Gerrera sees Jyn come to visit him on the same day that an Imperial pilot defects and comes to him with a message from her father, he becomes awfully suspicious that there's more going on.
"Today, of all days, it's a trap, isn't it?" he asks. "The pilot. The message. All of it. Did they send you? Did you come here to kill me?"
The fallen statue in Jedha City is a reminder of the fading Jedi religion.
Remember Order 66? Darth Vader and the Empire hunted down most of the Jedi in "Episode III." Everyone else, including Obi-Wan Kenobi has gone into hiding.
The holy city of Jedha is all that remains of the Jedi until it's destroyed in "Rogue One." That's why you don't see any Jedis in the movie, just people who believe in the Force.
Mon Mothma has a small moment with Bail Organa where she mentions his "Jedi friend."
Mothma tells Organa that the Rebel Alliance will need every advantage going up against the Empire. In doing so, she asks about his friend, "the Jedi." Organa says he'll send for him.
She's referencing none other than Obi-Wan Kenobi.
The moment we see in "Rogue One" is the set up for Princess Leia to get the Death Star plans to Obi-Wan Kenobi.
Right afterwards, Organa says he would trust Leia with his life.
In the next movie, "A New Hope," he's killed after Leia is captured by Vader and her home planet of Alderaan is destroyed.
In case you were wondering, yes, that's Mustafar!
Though "Rogue One" announces almost every other location in the movie, it never clearly says whether Vader is on Mustafar. You can rest easy knowing we revisit the location of Vader and Obi-Wan's final battle in "Revenge of the Sith."
According to "The Art of Rogue One: A Star Wars Story," the team used famed "Star Wars" artist Ralph McQuarrie's original artwork for Vader's "nightmare castle" for his home on Mustafar. It houses a massive machine, a one-person bacta tank, that serves as a healing and meditation chamber.
"The castle on Mustafar is this insanely uninviting place — a really evil place, deeply uncomfortable. But this is where Vader stays, because it's the only place he feels comfortable," says concept artist Christian Alzmann in "The Art of Rogue One."
When you know where Vader's healing chamber is located, it's a little heartbreaking.
"You realize that he's this crippled, broken, tragic figure — and that what he's looking at through his window is the location where his duel with Obi-Wan took place," said "Rogue One" script writer Gary Whitta. "The fact that he'd chosen to build his living mausoleum here is a nod to the conflict in him — that he would go back to this place to reflect on what happened to the man he once was. At the same time, it's also terrifying, and when he emerges with all of his armor, he's Darth Vader."
When they're about to infiltrate the Citadel in Scarif, K-2SO is about to say "I've got a bad feeling about this," but gets cut off by Jyn and Cassian.
While searching for the Death Star plans, Jyn reads through a list of project names including "Black Saber."
That probably sounded familiar to fans of the animated series, "Star Wars: The Clone Wars."
The saber is better known as the Darksaber on "Clone Wars." It's an ancient sword-like black saber with a pretty flat blade and a whitish/gray glow.
A Hammerhead Corvette is used to push the two Star Destroyers into one another.
The transport vehicle shows up in animated series "Star Wars: Rebels." The ship is similar to one seen in video game "KOTOR" (Knights of the Old Republic).
Bonus: There's a simple reason the Death Star is called the Death Star.
While discussing Jyn's kyber necklace, Chirrut says that the strongest stars have a heart of kyber.
Not only is Chirrut sort of talking about Jyn, but he's also indirectly referencing the Empire's new weapon without knowing it. Since we know the Death Star is fueled by kyber crystals, literally the strongest star in the galaxy has a heart of kyber.
In his hologram message to Jyn later, Galen says, "We call it the Death Star. There is no better name." He's not wrong.