Space Science

Neil deGrasse Tyson's number-one New York Times best-selling guide to the cosmos, adapted for young listeners. From the basics of physics to big questions about the nature of space and time, celebrated astrophysicist and science communicator Neil deGrasse Tyson breaks down the mysteries of the cosmos into bite-sized pieces.

Fleet of Worlds takes a closer look at Human-Puppeteer (Citizen) relations and the events leading up to Niven's first Ringworld novel. Kirsten Quinn-Kovacks is among the best and brightest of her people. She gratefully serves the gentle race that rescued her ancestors from a dying starship, gave them a world, and nurtures them still. If only the Citizens knew where Kirsten's people came from.

The Alliance has been fighting a losing battle against the Syndicate Worlds for over a century. Now, Captain John “Black Jack” Geary, who returned to the fleet after a hundred-year suspended animation, must keep the Alliance one step ahead of its merciless foe… After a series of deadly engagements, the Alliance fleet is severely damaged and its arsenal is running low. Forced to halt in the Baldur Star System to raid the Syndic mines for raw materials, Geary is anxious to get moving again.

Kay’s life is pretty boring. She goes to school, spends quiet evenings at home with her foster mom, and has the occasional brush with mischief thanks to her best and only friend Will. But everything is about to change. One night, Kay tags along on another one of Will’s adventures, and they both end up recruited by a talking fox to become Netherjacks, protectors of all the worlds. Once they arrive at the training academy, though, Will is paired with a legendary Netherwing mount and quickly rises in the trainee ranks, leaving Kay behind with barely a glance.

Authors Christopher Knight and Alan Butler realized that the ancient system of geometry they presented in their earlier breakthrough study works as perfectly for the Moon as it does the Earth. On further investigation, they found a consistent sequence of beautiful integer numbers when looking at every major aspect of the Moon - no such pattern emerges for any other planet or moon in the solar system. In addition, Knight and Butler discovered that the Moon possesses few or no heavy metals and has no core - something that should not be possible.

With the galaxy thrown into chaos by mutual breaches of the Two Hundred Years' peace, what seemed like an isolated incident on the Thelicosa/Merida border has become an epidemic. In the midst of this chaos, the Thelicosan and Meridan fleets on their respective borders have come to a sort of tense peace after the events in Book II, but now it's clear: Somebody wants war. And it's not the Free Systems of the galaxy.

For two years, the Castle Federation and the Alliance of Free Stars have stood against Marshal James Walkingstick of the Terran Commonwealth and his mission of conquest. Battles have been won and lost, worlds have died, and soldiers like Admiral Kyle Roberts have been forged on the anvil of war. But the Alliance cannot win. The Commonwealth has more worlds, more ships, more soldiers. They claim their victory is inevitable. That history is on their side. Refusing to accept the Commonwealth's future, the Alliance embarks on a do-or-die mission to end the war in one strike.

Persecuted refugees from six separate alien races have migrated to the idyllic planet Jijo. And despite their incredible diversity, the inhabitants live together in blissful harmony. However, settlement on Jijo is illegal - and it's only a matter of time before the residents of this forbidden paradise are discovered by the galactic powers-that-be.

This survival guide for new pilots identifies the pitfalls waiting inside the killing zone, the period from 50 to 350 flight hours when they leave their instructors behind and fly as pilot in command for the first time. Although they're privately certified, many of these unseasoned aviators are unaware of the potential accidents that lie ahead while trying to build decision-making skills on their own - many times falling victim to inexperience.

The year is 3326. Nigel Sheldon, one of the founders of the Commonwealth, receives a visit from the Raiel - self-appointed guardians of the Void, the enigmatic construct at the core of the galaxy that threatens the existence of all that lives. The Raiel convince Nigel to participate in a desperate scheme to infiltrate the Void. Once inside, Nigel discovers that humans are not the only life-forms to have been sucked into the Void. The humans trapped there are afflicted by an alien species of biological mimics.

The Inhibitors were designed to eliminate any life-form reaching a certain level of intelligence - and they've targeted humanity. War veteran Clavain and a ragtag group of refugees have fled into hiding. Their leadership is faltering, and their situation is growing more desperate. But their little colony has just received an unexpected visitor: an avenging angel with the power to lead mankind to safety---or draw down its darkest enemy.

For millennia, the planet Harmony has been protected by the Oversoul, an artificial intelligence programmed to prevent thoughts of war and conquest from threatening the fragile remnant of Earth's peoples. But as the Oversoul's systems have begun to fail, a great warrior has arisen to challenge its bans.

Rapid colonization of the moon is pushing both national space agencies and powerful corporations to negotiate a New Lunar Accord in an effort to prevent escalating conflicts over valuable resources and territory. But hope that this treaty will bring stability to the nascent lunar civilization is suddenly dashed when a high-energy solar storm causes a cascade of destruction to the vast satellite constellations that orbit Earth. Now it’s only a matter of weeks before the ever-increasing debris cloud makes travel back to the home planet impossible.

Evelyn enjoyed living a nice quiet life in an anarchic pirate port, far from the world she’d once conquered. Then came an attack by mercenaries that made her angry. By the time the dust settled, she had a group of former slaves which she’d freed, her djinn assistant had convinced several of the women that they should join Evelyn’s brand-new harem, and she was looking for a new home, likely aboard a ship.

Hugh had been taught that, according to the ancient sacred writings, the Ship was on a voyage to faraway Centaurus. But he also understood this was just allegory for a voyage to spiritual perfection. Indeed, how could the Ship move, since its miles and miles of metal corridors were all there was of creation? Science knew that the Ship was all the universe, and as long as the sacred Converter was fed, the lights would continue to glow, the air would flow, and the Creator's Plan would be fulfilled.

Wil Sietinen is driven by duty. Torn between his responsibilities as heir to a preeminent family dynasty while training to be an officer in the galactic military, he would rather design starships than plot political schemes or battle strategies. But when Wil is captured by a mysterious alien enemy, he learns that a brutal war has been secretly waging for centuries… and his unique telekinetic powers are the last hope to end the conflict.

On the lost colony planet of Croatoan, the job of the police force is to keep the peace, even if it means turning a blind eye to all varieties of crimes. DCI Lutero Cade knows how to play the game – but when it comes to murder, he is more than willing to rock the boat. Now, with a serial killer on the loose, Cade knows he’s about to do a whole lot of boat rocking.

New ER doctor Alexi Sur always intended to join an aid agency. She'd just expected to work among humans. When the Pax Galactica Corps becomes her only option (don't ask—the debts aren't hers, but the family is, much to her regret), Alexi finds herself traveling the galaxy and learning alien physiology and culture, all while becoming a reality TV star. Being pursued by camera drones and starring in her very own Welcome-to-the-Universe documentary was never on Alexi's to-do list.

The first interstellar war, a generation ago, left humanity enslaved. Now humans fight in the armies of their masters to save themselves from annihilation. At least, that's what the propaganda insists is true. What the layers of lies keep hidden is how badly the new war is going for the people of earth. Now it's Dylan Kane's turn to blast into the heavens and join the battle, but what his masters don't know is that by putting a weapon in his hands, they're giving him the key to unlocking his hopes of freedom.

At his death in 1988, Robert A. Heinlein left a legacy that almost single-handedly defined modern science fiction. But one of Heinlein's masterpieces was never finished. In 1955, he began work on Variable Star, a powerful and passionate tale of two young lovers driven apart by pride, power, and the vastness of interstellar time and space. Now, the Heinlein estate has authorized award-winning author Spider Robinson to expand his outline into a full-length novel. And the result is vintage Heinlein.