OPSC 2019 Solved Paper

The Hubble space telescope is used to observe the changes in the solar system. The Hubble space telescope was launched in low earth orbit in 1990 s. It was built jointly by the NASA and European Space Agency. It was launched in April 1990 by Space Shuttle Discovery.
Hubble observatory has made more than $1.3$ million observations since its mission period which began in 1990 . It is the only space telescope which is maintained by Astronomers.