The Hubble Space Telescope still shines in the eyes of astronomers after 36 years in orbit, but it is not as nimble as it once was. Left alone, the observatory will plunge back into the atmosphere in the early-to-mid-2030s, closing the book on one of the most famous scientific instruments of the century.
NASA last raised the orbit of Hubble in 2002, when the Space Shuttle Columbia visited the observatory for a servicing mission. The final shuttle servicing flight in 2009 did not reboost the telescope’s orbit, and with the retirement of the shuttle fleet two years later, Hubble has steadily lost altitude with no way to stave off eventual destruction.
The space agency released a Request For Information (RFI) on Thursday asking commercial companies for ideas on how to reboost, service, or a controlled disposal of Hubble. Responses are due November 30. Specifically, NASA is looking for information about companies’ current and near-term capabilities for capturing Hubble and boosting it to an altitude of at least 373 miles (600 km), enhancing the telescope’s performance through, or guiding Hubble to a controlled reentry.
“The requirement includes that the boost and/or servicing mission must not harm the HST and that this mission is expected to occur by 2032,” NASA wrote in the RFI. The contractor would be responsible for providing the launch vehicle, servicing spacecraft, mission operations, and “crew if applicable.”
NASA is not committing to buying a Hubble rescue mission, but officials want to know who might be interested in mounting such a mission, how much it would cost, and which companies would have a realistic shot at reaching Hubble before it falls out of orbit and burns up on reentry. Orbital dynamicists currently predict that it will likely happen in 2033 or 2034 without intervention, but reentry forecasts can change based on solar activity.
It took 24 years for Hubble, which lacks onboard propulsion, to glide from its 2002 altitude of 362 miles (583 km) to its current orbit some 292 miles (470 km) above Earth. A reboost to NASA’s requirement of 373 miles (600 km) would likely keep Hubble in orbit for at least 25 more years.
