[AZ-Observing] Re: How many Asteroids?

The ASU library or a used book store have old science textbooks. That's one 
quick way to filter that question down. 
Scott 
Sent via BlackBerry by AT&T

-----Original Message-----
From: "Rick Tejera" <saguaroastro@xxxxxxx>

Date: Thu, 28 Aug 2008 19:26:41 
To: <az-observing@xxxxxxxxxxxxx>
Subject: [AZ-Observing] How many Asteroids?


All,
Lindsay's Science curriculum this year has an astronomy unit that will focus
on the Solar System. I've offered to do a presentation for the class when
they get to that unit. My working title is "Not Your Dad's Solar System".
The theme will be the advances in what we know about the solar system now
compared to when I was in 7th grade (1972, yeah, I'm old). One of the
comparisons is the growth in how many asteroids there are now vs. how many
were know back then. Any ideas where I can dig this up?

Thanks
Clear Skies

Rick Tejera
Editor SACnews,
Public Outreach Coordinator
Saguaro Astronomy Club
Phoenix, Arizona
www.saguaroastro.org <http://www.saguaroastro.org/> 
saguaroastro@xxxxxxx 




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