Here is a list of some popular and critically acclaimed sci-fi movies from 2019 with a brief summary:

• “Ad Astra”: An astronaut travels to the outer edges of the solar system to find his father and unravel a mystery that threatens the survival of our planet.
• “Avengers: Endgame”: After the devastating events of Avengers: Infinity War, the universe is in ruins. With the help of remaining allies, the Avengers assemble once more in order to undo Thanos’ actions and restore order to the universe.
• “Star Wars: Episode IX – The Rise of Skywalker”: The surviving Resistance faces the First Order once more as Rey, Finn and Poe Dameron’s journey continues. With the power and knowledge of generations behind them, the final battle commences.
• “Captain Marvel”: Carol Danvers becomes one of the universe’s most powerful heroes when Earth is caught in the middle of a galactic war between two alien races.
• “Alita: Battle Angel”: A deactivated female cyborg is revived, but cannot remember anything of her past life and goes on a quest to find out who she is.
• “Spider-Man: Far From Home”: Peter Parker and his friends go on a summer trip to Europe. However, Peter’s plan to leave super heroics behind for a few weeks are quickly scrapped when he begrudgingly agrees to help Nick Fury uncover the mystery of several elemental creature attacks.
• “Blade Runner 2049”: A young blade runner’s discovery of a long-buried secret leads him to track down former blade runner Rick Deckard, who’s been missing for thirty years.
• “Ex Machina”: A young programmer is invited to administer the Turing test to an intelligent humanoid robot.

Please note that this list is not comprehensive and other sci-fi movies might also be considered as best, but these are some of the popular and critically acclaimed sci-fi movies of 2019.