1. Rainbows are full circles, not arches. We usually only see half of a rainbow because the ground gets in the way! If you are high up in an airplane or on top of a mountain, you can look down and see a complete 360-degree rainbow circle.

2. You can never reach the end of a rainbow. A rainbow isn't a physical object in a fixed spot—it is an optical illusion that moves as you move. As you walk toward it, the rainbow shifts back at the exact same speed, so there's no pot of gold to find!

3. No two people see the exact same rainbow. Because light reflects off millions of tiny raindrops, every person stands in a slightly different spot and sees sunlight bent through a totally different set of water drops. Your right eye even sees a slightly different rainbow than your left eye!

4. Raindrops act like miniature prisms. White sunlight is actually made of all the colors mixed together. When sunlight enters a raindrop, the water bends (refracts) the light, splitting it into its distinct colors, bounces it off the back of the drop, and shoots it back to your eyes.

5. You can see a rainbow at night. Called a moonbow, these rare rainbows are created by light reflecting off the moon instead of the sun. Because moonlight is much fainter, moonbows often look like glowing white arcs to our eyes.

6. The sun must be behind you to see one. To spot a rainbow, the sun has to be low in the sky behind your back, while rain or mist is in front of you. If you face the sun, you won't see a rainbow!

7. ROY G. BIV helps you remember the colors. The seven standard colors of the rainbow always appear in the exact same order: Red, Orange, Yellow, Green, Blue, Indigo, and Violet!