Katie Couric's Notebook: Supermoon

A tree brunch is pictured against a perigee moon as it rises in Washington, DC, on March 19, 2011. A perigee moon is visible when the moon's orbit position is at its closest point to Earth during a full moon phase. The full moon coincided with its closest approach to the Earth, 221,565 miles, making the so-called 'super moon' look slightly larger than average. Getty Images

If the moon hits your eye, like a big pizza pie this Saturday night, it's not necessarily amore. You'll be seeing what's called a supermoon.

On March 19th, the moon will be closer to the Earth than it's been in 18 years. Just a paltry 222,000 miles away. And it will also be a full moon.

So it will appear larger. But is it dangerous? One astrologer thinks so. He says the moon's close proximity could cause earthquakes and tidal waves around the globe.

That claim has received a lot of attention online - in the wake of the on-going catastrophe in Japan. But the folks at NASA say there's nothing to it. The scientific research shows that the supermoon may have an added effect on the tides. But that's about it.

So, on Saturday, order that pizza pie, hope for clear skies and enjoy the view.

That's a page from my notebook.

I'm Katie Couric, CBS News.

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