That's a great question, but there's no single "brightest star in the west" because the sky is constantly changing!

Here's why:

* Earth's Rotation: The Earth rotates, so the stars appear to move across the sky throughout the night. A star might be in the west at one point, but move to another part of the sky later on.

* Time of Year: The position of stars changes throughout the year due to the Earth's orbit around the sun.

* Your Location: The stars you see in the west will vary depending on your location on Earth.

To help you figure out what you might be seeing:

* Tell me your location: Where are you located? (City and state/country)

* Tell me the time: What time of night is it?

* Describe the star: Is it white, red, yellow? Does it twinkle? Is it near any other bright stars or constellations?

With this information, I can help you identify the star!