
If you're looking for manga similar to Sazan & Comet Girl, you might like these titles.
A sci-fi retelling of Wagner's "Ring of the Nibelungen", starring Captain Harlock.
Set during an era when the Galactic Empire is hunting down the last of the Jedi, a fledgling rebellion against the Empire begins to take form. Star Wars Rebels takes place in the area surrounding the planet Lothal, where the Galactic Empire battles against Ezra, a teenage con artist with latent Force abilities, Kanan, one of the last surviving members of the Jedi Order, and the rest of the ragtag rebels on board the starship Ghost.
In order to become a stronger person, a young boy named Hiroshi stows away on a freighter bound for planet Daibaran. The freighter comes under fire from an Afressian fleet, but is saved by the appearance of a mysterious spaceship. Upon reaching his destination, Hiroshi finds a job in one of the roughest saloons on the planet in order to toughen up, but ends up in an unfair fight when the Afressians begin to search for the one who attacked them. He is eventually rescued by a cloaked woman, who reveals herself to be Emeraldas, captain of the mysterious ship that saved him before. Stung by two defeats, the Afressian leader Bararuda decides that there is only room for one queen in space... but can a single ship piloted by one woman stand against the fury of a whole empire?
Five hundred years ago, Rudolf von Goldenbaum united the disparate governments of humankind and established a mighty human empire, a tribute to his own greatness that stretched across the galaxy. Demanding loyalty and discipline, Rudolf created an order designed to long outlast his own rule; but all human works fade in time. Today, the decaying empire faces the threat of the Free Planets Alliance, and military leaders on both sides jockey for power in the face of a seemingly inevitable conflict. On the side of the empire, the young general Reinhard von Lohengramm sees war as opportunity, and the empire as soft clay ready for his own sculpting. On the side of the alliance, would-be historian Yang Wen-li would like nothing better than to live out his days in peace - but times of war have little use for men who waste their days studying the mistakes of the past. Circumstances will make heroes and villains of both these men, as they write new history one blood-splattered page at a time.
You journeyed with Jint and Lafier through pain and companionship, as they forged their way through an impossible ordeal unscathed. But that adventure, though grand, was just the introduction to a larger, decades-spanning chronicle of galactic war. Join our two heroes, now bona fide starpilots appointed to a warship in an Abh Empire fleet, as they participate in their very first official military operation. They are tasked with helping defend a strategically crucial star system from the Three Nations Alliance. Complications arise, however, when they learn that their commanding officer is none other than the sister of the Abh baron they killed three years prior!
A long time ago in a galaxy far, far away....It is a period of civil war. Rebel spaceships, striking from a hidden base, have won their first victory against the evil Galactic Empire. During the battle, Rebel spies managed to steal secret plans to the Empire’s ultimate weapon, the DEATH STAR, an armored space station with enough power to destroy an entire planet. Pursued by the Empire’s sinister agents, Princess Leia races home aboard her starship, custodian of the stolen plans that can save her people and restore freedom to the galaxy….
Humanity has stretched its reach into space and has settled onto a number of planets. For the past several hundred years, though, most of man’s territory has been politically and militarily dominated by the Tytania clan. However, their grip of power begins to shake when an admiral from Euria, Fan Hulic, preposterously manages to win a battle against an armada commanded by a Tytanian duke. Now wanted by Tytania, Fan Hulic flees from one planet to another. His travels will lead him to many places and many people, all of whom finally have hope that the hated Tytania can finally be defeated.
In the year 2199, unrelenting attacks from the planet Gamilus have forced all life on Earth into underground dwellings and raised radiation levels to near-toxic levels. The only way to clean up all this harmful radiation is by using the Cosmo Cleaner, which the Queen of the planet Iscandar has generously offered to humanity. Unfortunately, Iscandar is 148,000 light years away, but Earth only has one year before rising radiation levels make it uninhabitable! The only vessel capable of making the journey is the Yamato - a spaceship equipped with advanced technology and modeled after the famous WWII battleship. Can the crew of the Yamato make it to Iscandar and back before the extinction of all life on Earth?
The “golden brat” Reinhard von Lohengramm, a military prodigy and admiral of the Galactic Empire, has ambitions beyond protecting the borders or even defeating the empire’s enemies. He seeks to overthrow the old order and become a truly absolute—yet benevolent—dictator. His rival, the humble Yang Wen-li of the Free Planets Alliance, wishes to preserve democracy even if he must sacrifice his political ideals to defeat the empire. Their political and military battles play out over a galactic chessboard in an epic saga fifteen centuries in the making!