You've just found an asteroid that threatens Earth. Who are you going to call?

This week on Planetary Radio. planetary radio. I'm Welcome to the travel show that takes you to the Final Frontier.

I'm Matt Kaplan at the Planetary Society and I'll tell you who to call.

It's the Minor Planet Center, the Global Nerve Center for cataloging space rocks and

dirty snowballs, including the ones that cross the path of our home planet.

We'll talk with its director, Tim Spar.

You'll also hear from Bruce Betts,

and Bill Nye has an explosive commentary,

literally.

Emily Lachto-Wala is still on vacation, so we welcome back Planetary Society contributing editor

Jason Davis.

Jason, a happy post 4th of July to you.

I know that you were sort of saluting the holiday with your piece that came out on July 3rd called

a patriotic return to space which is mostly the very good news that we all enjoyed when Discovery rocketed back up there

but it also brought me back to that day hard to believe it was 27 years ago

one of the saddest of my life when the challenger blew up moments after lifting off.

I was looking up the photos of those wonderful people who died in that accident.

The grief of that day all came back to me.

It was a very sad thing.

Yeah, yeah.

I really think that Challenger was a unique event and then it really stung the country

like no other space disaster had at that time and there hasn't done since the

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