I would place a space telescope at a distance of approximately 4.5 billion light years from Earth, in the direction of the galaxy cluster known as the "Cosmic Evolution Survey" (COSMOS) field. This location would provide an unparalleled view of the early universe, allowing us to document and study the formation and evolution of galaxies, stars, and other celestial objects.

The main purpose of this observation would be to gain a deeper understanding of the physical processes that shape the universe, such as the role of dark matter and dark energy, and to study the properties of the first galaxies that formed after the Big Bang. Additionally, this telescope would also be able to detect and study distant supernovae,which would provide valuable information about the expansion rate of the universe and the properties of dark energy.