Spaceship Neptune is lifted gently to space by our SpaceBalloon™, which is propelled by renewable hydrogen at the gentle speed of ~12 mph. Based on proven technology, our SpaceBalloon™ is the same type that has flown to space more than a thousand times by NASA and other reputable entities—not to mention by our own team members—including with payloads heavier than our Spaceship Neptune capsule. 

Soon to be the largest human spacecraft in operation (excluding the space stations), Spaceship Neptune's spherical capsule is 16 feet (4.9 meters) in diameter, providing a pressurized volume of more than 2,000 cubic feet (60 cubic meters). The capsule interior maximizes both space and comfort and accommodates eight Explorers and a Captain.

In addition to our primary flight system, Spaceship Neptune is equipped with a backup descent system—four parachutes situated between the capsule and the SpaceBalloon™ that can take over seamlessly and instantaneously in the event of a contingency, ensuring a safe landing. These kinds of parachutes have been used by spacefaring agencies over decades without incident.

Every seat is engineered for safety and comfort. Seats are oriented within the cabin to maximize views of the stars above and Earth below. Ergonomically designed, these seats merge the best of aerospace innovation with the luxury of first-class travel.

Our one-of-a-kind restroom provides a spa-like sanctuary during the six-hour spaceflight. The lavatory will not only surpass the experience you would find in a first-class airplane cabin, but also will serve as a solo oasis. Because the capsule is pressurized, there is no need for a vacuum toilet like on other spacecrafts. Having a proper and beautifully designed lavatory on board contributes hugely to the uniqueness of the experience we are offering.

Designing Spaceship Neptune is an engineering feat, requiring a modern suite of tools to maximize comfort, safety, and sustainability from design testing to production. We collaborate with Siemens to develop a comprehensive digital twin to visualize and test the capsule and its systems in an unprecedented way and accelerate processes.

Spaceship Neptune will be the largest human spacecraft in operations (excluding the space stations), and represents a significant milestone in U.S. entrepreneurship and the first commercial spacecraft designed, developed, and manufactured without the backing of a billionaire or significant government funding. Our capsule teams bring decades of industry expertise from the likes of NASA, SpaceX, and Virgin Galactic.

Uniquely, Space Perspective is vertically integrated with in-house capsule design, manufacturing, testing, and operational functions. This includes a carbon composite manufacturing facility with state-of-the-art process control, a material testing laboratory, and a capsule integration hangar. The flight electrical and power systems, software, mission control, and the environmental control and life support systems (ECLSS) are also designed and built in-house, as are the company's SpaceBalloon™, which are manufactured in its 700-foot-long Seely SpaceBalloon™ Factory, named after late chemical engineer and balloon science pioneer Loren G. Seely, whom the company's head of balloon development and manufacturing studied under.