Lunar rays are the bright streaks of light that radiate from some lunar craters, and they are the same age as the craters themselves.

Here's why:

* Impact events: Lunar rays are formed when an asteroid or comet impacts the Moon's surface. The impact throws up a massive amount of material, which then falls back down, creating the rays.

* Age of craters: Since the rays are formed at the same time as the crater, they share the same age.

* Dating techniques: Scientists can use the age of the craters to estimate the age of the lunar rays.

Therefore, lunar rays are essentially the same age as the impact event that created the crater they emanate from.