The heavenly bodies certainly move in a curved track. Scientifically explained, every moving celestial body is controlled by the forces of gravity and the forces of contrast.
When two opposing forces are balanced, they will be pushed around the Earth at a horizontal speed or angular velocity.
The theory of relativism proves that light, as matter, also curves as it passes through the plane affected by the force of gravity. On this principle, all movements in the universe are totally unknown to a straight line.
By knowing the movement of celestial bodies in space, humans are finally helped to launch satellites.
This is what the Qur'an calls al-uruj. Al-uruj means going up and out of a straight line or walking in a curved track. The book 'Science in the Qur'an' written by Nadiah Thayyarah explains the movement of every solid object from Earth to the sky must be in a curved track.
Before humans do modern research and know the curved trajectory of objects or objects in the sky, the Qur'an has illustrated the rise of solid objects to the heavens in one verse.
"He knows what goes into the earth, what comes out of it, what comes down from heaven and what goes up to it, And He is the Most Merciful, the Forgiving," Surah Saba 'Ayat 2.
"He created the heavens and the earth in six ages: Then He dwells on the 'Throne He knows what goes into the Earth and what comes out of it and what comes down from heaven and what rises to Him And He is with you wherever you are and Allah is Seer of what you do, "says Surah Al Hadid.
All of that corresponds to the Qur'anic explanation of the journey into space with the term uruj, which means to rise and deviate from a straight line.