AILSA CHANG, HOST:
So Mary Louise, got any big plans this month?
MARY LOUISE KELLY, HOST:
Well, you know, the usual - leaves are changing, finally sweater weather, once-in-a-lifetime comet viewing.
CHANG: Sweater weather (laughter). OK, but one of those things is not like the others. Can you just expand on that last celestial part?
KELLY: I can. This is next week. A comet known as Lemmon will be as close to Earth as it's going to get, and it'll be bright enough to see with the naked eye.
CHANG: Ooh, very cool.
KELLY: Yes, and astronomers calculate it is on a 1,350-year orbit around our sun.
CHANG: Meaning this is a limited-time offer.
KELLY: Exactly. And it's next Tuesday, the 21 - Lemmon and a new moon. It's NPR News. Transcript provided by NPR, Copyright NPR.
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