From the brains behind brains on, this is the moment of um.

Answering those questions that make you go.

I'm Rosie DuPont. When was the last time you looked at the moon?

It's like your nose, it's always there, but we don't always think about it.

On most nights without too many clouds, you can go outside and find the moon, hanging high in the sky.

Sometimes it's round and full, sometimes it's just a teeny sliver, but the shape isn't the only

thing that's different about the moon.

Hi, my name is Arturo from Tucson, Arizona, and my

question is, why does the moon change color sometimes? The moon actually doesn't change color. It looks like it

changes color because of the Earth's atmosphere. My name is Sarah Comprud, and I teach astronomy here at the Bell Museum.

So the moon can appear to change color based on a few different things with the Earth's atmosphere.

During a total lunar eclipse, for instance, you often hear it being referred to as the Blood Moon,

and it turns that kind of reddish-orange-ish color. That happens because as the light

passes through the earth's atmosphere, the red light kind of gets bent and shines on the moon.

In that case, if there's more pollution, either natural or man-made pollution in the Earth's atmosphere,

the deeper red it will turn. If we're looking at the moon on the horizon,

and it kind of has this nice golden orange color,

and then later in the evening we see it nice and high overhead,

and it's more white, those colors change

based on how much of the Earth's atmosphere

the light reflected off the moon has to pass through.

It has to pass through more atmosphere on the horizon. And again,

...