Here's how it breaks down:
* Aim: To focus your efforts on something.
* Stars: A symbol of something unattainable, distant, and incredibly high.
The idiom suggests that even if you don't reach the stars, aiming for them will still push you to achieve something great. It's about having a big vision and pushing yourself beyond your perceived limits.
Examples:
* "Even though she's just starting out, she's aiming for the stars with her new business."
* "Don't be afraid to aim for the stars, even if you think it's impossible."
* "He always says, 'Aim for the stars, and you'll at least reach the moon.'"