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Meet Dr. Dish!
<IMG SRC="https://webarchive.library.unt.edu/eot2008/20090825033507im_/http://deepspace.jpl.nasa.gov/dsn/images/drdish3-large.jpg" WIDTH="450" HEIGHT="400" VSPACE="5" BORDER="0" ALT="Dr. Dish"><BR> Dr. Dish here! Did you know that the farther away a spacecraft is, the bigger the antenna you need to pick up its radio signals? For a spacecraft in Earth orbit, like the ones people use to get TV shows, you need only a small dish. If that satellite were at the moon, hundreds of thousands of miles away, you'd need a dish as big as a two-story house! And if it were millions of miles away, like Mars or the other planets, you'd need a dish that's ten times that big - like the ones at the Deep Space Network!
Learn More from Dr. Dish...

GAVRT Connect the Dots Activity
Connect the Dots...

Come to the Space Place and find out...

How are space engineers way wilier than superheroes? How are space engineers way wilier than superheroes?
No superhero can match what ordinary humans have done to solve one really big problem of space exploration. How ever do we communicate with the tiny spacecraft we send out to explore deep, dark space and strange other worlds?

Watch the Race of the Data Watch the Race of the Data
We use very large dish-like antennas to listen for signals from our far-away spacecraft. Like a teacher with too many students, we have quite a few spacecraft to keep track of, and not very many antennas. So we can't expect one antenna to spend all day or all night listening to just one spacecraft.

Have super hearing with a super cound cone! Have super hearing with a super sound cone!
Pick out tiny sounds your ears alone can't hear. Make a simple sound cone to turn up the volume on whatever sounds are coming from a particular direction. You will be amazed!


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