Archive | Our Solar System

Ep. 29: Asteroids Make Bad Neighbors

This week we’re talking about asteroids. And not just any asteroids, but Near Earth Objects. How do astronomers find these things, why are they buzzing around the Earth, what are the chances we’ll actually get hit, and what would happen if we did get hit? How could we stop them? Episode 29: Asteroids Make Bad […]




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Ep. 19: Comets, Our Icy Friends from the Outer Solar System

The sudden brightening of Comet McNaught has reminded us what a treat it can be to see a comet with the unaided eye. A diffuse ball with a long tail stretching across the sky. There’s nothing else in the night sky that can compare to a bright comet. But what are these objects, where do […]




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Special Alert: Go See Comet McNaught

There’s a big bright comet visible in the sky right now. Listen to this special alert, and then go outside right at sunset to see Comet McNaught with your very own eyes. You’ve got to move quickly, as it’ll be lost in the glare of the Sun. Don’t worry, it’ll reappear shortly, and could be […]




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Ep. 17: Where does the Moon Come From?

We take the Moon for granted, but its effect on the Earth is very important; possibly even critical for the formation of life. But where did it come from? Did the Earth and Moon form together? Or did the Earth capture a wayward Moon? Or was there a more catastrophic cause to this lunar mystery? […]




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Ep. 8: Meteor Showers. Yes, the sky is falling.

Dress warmly, gather some friends and family, and head outside to watch sand burn in the upper atmosphere. There’s nothing like a good meteor shower. Fraser and Pamela explain this beautiful phenomenon: what causes them, the best storms and showers to watch for, and different types of meteors you might see. Download Episode 8: Meteor […]




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Ep. 1: Pluto’s Planetary Identity Crisis

Pluto. It’s a planet, then it’s not. This week we review Pluto’s history, from discovery to demotion by the International Astronomical Union. Learn the 3 characteristics that make up a planet, and why Pluto now fails to make the grade. Download Episode 1: Pluto’s Planetary Identity Crisis (12.6 MB)




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