Meaning: This sentence is suggesting that you learn more about the sky.
Choice of Words: Learn means to gain knowledge or understanding. Sky is the big, blue space above our heads.
Alternative Expressions
Study the sky
Meaning: This means that you want to learn more about the sky by observing it and doing research on it.
Choice of Words: **Study** means to examine or investigate something in order to learn more about it. **The sky** refers to the expanse of air and space above the earth. When you put these words together, it means to examine or investigate the sky in order to learn more about it.
Explore the sky
Meaning: This means that you want to learn more about the sky by going up into it and looking around.
Choice of Words: **Explore** means to investigate or travel through an area in order to learn more about it. **The sky** refers to the expanse of air and space above the earth. When you put these words together, it means to investigate or travel through the sky in order to learn more about it.