He spent many hours observing the planet.

Meaning: The scientist used a lot of time looking at the planet very carefully.

Choice of Words: Spent means to use or pass time. Hours means a period of time equal to 60 minutes. Observing means to watch or look at something carefully.

Alternative Expressions

He devoted countless hours to scrutinizing the celestial body.

Meaning: This sentence means that he gave a lot of his time and attention to examining a planet very closely.

Choice of Words: **Devoted** means he gave his time and attention to something. **Countless** means too many to count. **Hours** are a measurement of time. **Scrutinizing** means examining something very closely. **Celestial body** is a general term for any object in space, such as a planet, star, or moon.

He dedicated himself to the meticulous examination of the extraterrestrial sphere.

Meaning: This sentence means that he gave all of his time and effort to looking at a planet from outside the Earth very carefully and in detail.

Choice of Words: **Dedicated** means he gave all of his time and effort to something. **Himself** means he did it himself. **Meticulous** means very careful and detailed. **Examination** means the act of looking at something closely. **Extraterrestrial** means from outside the Earth. **Sphere** is a round shape.

Related Expressions