Logo

Brainstorm: A Large Moon Rising
Listen in RealAudio
Email Your Comments

 
Dave Thurlow, Host
 
Today on The Weather Notebook, I have a Brainstorm about the moon. Hi, I'm Dave Thurlow from the Mount Washington Observatory. As with any Brainstorm, if we use your response on the air, we will send you a magnificent magic weather mug. And if you're not that lucky individual, don't worry because all respondents receive an answer to the Brainstorm and a Weather Notebook poster.

  
Moonrise in Chatham Strait. November 1991. Photo: Commander John Bortniak, NOAA Corps

So, dear listener explain this one? If you look at the moon when it's near the horizon, and later that night, check it out when it's high in the sky, you may notice something strange. The moon, when it's near the horizon, appears much larger than when it's up above your head. So today's brainstorm is...why? What causes the moon to appear larger near the horizon?

If you have an answer, give us a call toll free at 1-888-RAIN-001 and leave your answer on the machine. That number again is 1-888-724-6001. You can also send in your answer by visiting our website at mountwashington.org. You can send us an email from there. Finally, you can even send a letter to PO Box 2310, North Conway, New Hampshire 03860.

Again, today's brainstorm question is why does the moon appear much larger near the horizon than when it's high in the sky.

We'd like to thank our Senior Editor Jay Allison, Producer Bryan Sejvar, Engineer Sean Doucette and most importantly Listener Services Coordinator Susan Ross-Parent, because she's the one who sends out the posters and mugs. Also, thanks to Subaru and the National Science Foundation.

 

Here's the answer?