[2026] PTE Academic Reading - Re-order paragraphs

Before this technological breakthrough, astronomers relied solely on naked-eye observations to map the movements of planets and stars.

These early tools allowed researchers to observe previously hidden phenomena, such as the phases of Venus and the moons of Jupiter.

The study of celestial bodies has undergone a remarkable transformation since the invention of the telescope in the early 17th century.

Today, space exploration continues to challenge our scientific perceptions and reveal the fundamental mysteries of existence.

As optical instruments became increasingly sophisticated, our understanding of the universe expanded from a geocentric model to a vast, dynamic cosmos.