<P> Hubble orbits the Earth in the extremely tenuous upper atmosphere , and over time its orbit decays due to drag . If it is not re-boosted , it will re-enter the Earth 's atmosphere within some decades , with the exact date depending on how active the Sun is and its impact on the upper atmosphere . If Hubble were to descend in a completely uncontrolled re-entry , parts of the main mirror and its support structure would probably survive , leaving the potential for damage or even human fatalities . In 2013 , deputy project manager James Jeletic projected that Hubble could survive into the 2020s . Based on solar activity and atmospheric drag , or lack thereof , a natural atmospheric reentry for Hubble will occur between 2028 and 2040 . In June 2016 , NASA extended the service contract for Hubble until June 2021 . </P>
<P> Hubble orbits the Earth in the extremely tenuous upper atmosphere , and over time its orbit decays due to drag . If it is not re-boosted , it will re-enter the Earth 's atmosphere within some decades , with the exact date depending on how active the Sun is and its impact on the upper atmosphere . If Hubble were to descend in a completely uncontrolled re-entry , parts of the main mirror and its support structure would probably survive , leaving the potential for damage or even human fatalities . In 2013 , deputy project manager James Jeletic projected that Hubble could survive into the 2020s . Based on solar activity and atmospheric drag , or lack thereof , a natural atmospheric reentry for Hubble will occur between 2028 and 2040 . In June 2016 , NASA extended the service contract for Hubble until June 2021 . </P>
what layer of the atmosphere is the hubble telescope in
what layer of the atmosphere is the hubble telescope in
upper atmosphere
upper atmosphere