Our Vision: Enable NASA to realize the capabilities of assembling and servicing future spacecraft in space to solve the deepest scientific mysteries of the Cosmos.

Above: Concepts for servicing and in-space assembly of future large space telescopes. Left: Deep Space cis-Lunar Gateway (NASA). Center: Polidan et al (2016) Evolvable Space Telescope. Right: Lee et al. (2016)

Welcome to the NASA Exoplanet Exploration Program's in-Space Servicing & Assembly (iSSA) website. We are actively exploring the benefits of assembling future large telescopes in space rather than autonomously deploying them. One day NASA will want to launch a telescope or interferometer whose size and/or mass exceeds the launch capability of our largest rockets. Additionally, the deployment schemes may be very complicated and perhaps carry too much risk of something going wrong. In those cases, assembling these structures in space will be the enabling capability. Today, the largest telescope aperture that can be autonomously deployed is 6.5 m, to be demonstrated by NASA's James Webb Space Telescope.

We are examining the following questions:

  1. At what telescope aperture (or cost) would it be less expensive to assemble the telescope in space rather than deploy autonomously?
  2. What risks does iSSA mitigate compared to autonomous deployment? What risks are increased?
  3. How would a large telescope (> 15 m diameter) be assembled in space? And what would that cost?
  4. In what orbit would that assembly be conducted?
  5. What technologies are required to enable such an assembly? What is the state-of-art and what are the technology gaps?
  6. What technology demonstrations would help advance the technology?
  7. What is the optimal balance between astronauts and robots in assembling large telescopes in space?
  8. How will future large telescopes be serviced to extend their lives and upgrade their payload instruments?
  9. Why consider this now?

Stay tuned! If you are interested in joining our announcement email list, which will provide occasional updates in this activity, upcoming events, or news, please contact Brendan Crill.

Upcoming Presentations and Events:

JPL-Max Plank Institute for Astronomy direct imaging technology workshop. (invite only) Pasadena April 9-12: Siegler

STPI Roundtable on On-orbit Servicing, Assembly, and Manufacture of Spacecraft. (invite only) Washington DC, May 31, 2018: Mukherjee

iSSA of Large Aperture Telescope Workshop (invite only), JPL, June 5-6

SPIE Astronomical Telescopes and Instrumentation, Austin, 10 — 15 June: Thronson et alia

COSPAR 2018, Pasadena, 14 – 22 July: TBD

AIAA Space 2018, Orlando, 17 — 19 September: TBD

Recent News:

Deep Space Gateway (DSG) Science Workshop, Denver, February 27 — March 1

"On-Orbit Assembly of Space Assets: A Path to Affordable and Adaptable Space Infrastructure" Dr. Danielle Piskorz and Dr. Karen L. Jones, The Aerospace Corporation.

Future In-Space Operations (FISO) Working Group presentation: February 21, 2018

"Humanity's Biggest Machines Will Be Built in Space" Popular Mechanics Feb 16, 2018

"Scientists and engineers push for servicing and assembly of future space observatories" Space News Jan 10, 2018

231st American Astronomical Society Splinter Session: Astronomers, Astronauts and Robots: Enabling the Most Ambitious Future Space Observatories

National Harbor MD Jan 9, 2018

Archived Papers / Slides