No, an astronomical unit (AU) is much smaller than a light-year. Here's why:

* Astronomical Unit (AU): The average distance between the Earth and the Sun. It's about 93 million miles (150 million kilometers).

* Light-year: The distance light travels in one year. Light travels incredibly fast (approximately 186,282 miles per second or 299,792 kilometers per second).

Therefore, a light-year is significantly larger than an AU. In fact, one light-year is about 63,241 astronomical units.