02 Jul

Posted at 15:38h in Space by
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Commercial Space Station Made by Axiom Space

Axiom Space Station orbiting 250 miles above planet Earth.
Axiom Space plans to develop and build the first commercial space station in the world. Credit: Axiom Space
Axiom Space is a Houston-based company established in January 2016 that plans to build the world’s first commercial space station. Axiom Space plans to launch its first space station in 2020, which will be initially docked to the International Space Station (ISS). The ISS is currently funded up to 2024 and when it is decommissioned, Axiom’s orbital module will detach and fly freely on its own. Axiom’s station can house eight passengers. One prominent initial market is space tourists that would each pay $55 million for the adventure. Aside from an eight-day stay in space, this cost covers 15 weeks of training, much of it at the Johnson Space Center, a 10-minute drive from Axiom’s headquarters. Thus far, three entities have reserved for on-the-ground training, which starts at $1 million. The commercial station's interiors are being designed in partnership with famed French architect Philippe Starck, so they'll be quite a bit different from the utilitarian spaces of the ISS. Mr. Starck lined the walls with a padded, quilted, cream-colored, suede-like fabric and hundreds of tiny LED lights that glow in varying hues depending on the time of day and where the space station is floating in relation to the earth.

28 Dec

Posted at 02:46h in Posts, Space by
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A New Propulsion System from Accion Systems

Acccion Systems's propulsion system under testing on a magnetically levitating stand. Credit: Accion Systems
Accion Systems's propulsion system under testing on a magnetically levitating stand. Credit: Accion Systems
  A new space startup founded in 2013 in Boston called Accion (pronounced "ax-see-yon") Systems has patented an ion beam technology to propel small satellites. As government-funded large launches give away to commercial small satellite launchers such as Firefly Space Systems, there's a growing need to ensure small satellites have efficient propulsion system requiring little fuel to produce enough thrust. Without propulsion, a satellite has a very limited lifetime -- possibly as shortly as a few weeks. As in conventional ion engines, Accion's propulsion system produces thrust using electric fields to accelerate ions. However, the difference lies in how the ions are produced. Accion uses ionic liquid propellant which is a non-toxic liquid salt stored in passive plastic tanks. Ions leave thruster chips through small holes in grids over each chip and propel spacecraft in the opposite direction. This removes big ionization chambers, pressurized tanks, bulky valves, and external cathodes for neutralization. There are several major advantages with the low-cost hands-off manufacturing process being most touted as significant:  
  • It's modular and can be used in satellites ranging between 2 to 200 kg.
  • It's flexible since thruster chips can be placed anywhere on a satellite, in any number.
  • It's more efficient since it has higher thrust-to-mass and higher thrust-to-volume.
  • It's much less costly since low-cost automated batch manufacturing is used. In one run, they can make 44 thruster chips.
  Accion's major competitor in the realm of small satellite propulsion systems is Busek which has a lead of nearly 30 years more experience. However, Accion has said its design ensures a longer operational lifetime than Busek's equivalent.



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