how long will it take voyager to pass through the oort cloud
Oort cloud Space probes have yet to reach the area of the Oort cloud. Voyager 1, the fastest[51] and farthest[52][53] of the interplanetary space probes currently leaving the Solar System, will reach the Oort cloud in about 300 years[4][54] and would take about 30,000 years to pass through it.[55][56] However, around 2025, the radioisotope thermoelectric generators on Voyager 1 will no longer supply enough power to operate any of its scientific instruments, preventing any exploration by Voyager 1. The other four probes currently escaping the Solar System either are already or are predicted to be non-functional when they reach the Oort cloud; however, it may be possible to find an object from the cloud that has been knocked into the inner Solar System.
Hubble Space Telescope 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.[179] In 2013, deputy project manager James Jeletic projected that Hubble could survive into the 2020s.[3] Based on solar activity and atmospheric drag, or lack thereof, a natural atmospheric reentry for Hubble will occur between 2028 and 2040.[3][180] In June 2016, NASA extended the service contract for Hubble until June 2021.[181]