Astronomers have found more than 4,000 planets circling stars other than our own. What do we know about these alien worlds and how have we managed to detect them?
| Creator | N/A |
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| Actor | N/A |
| Country | United Kingdom |
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Astronomers have found more than 4,000 planets circling stars other than our own. What do we know about these alien worlds and how have we managed to detect them?
| Creator | N/A |
|---|---|
| Actor | N/A |
| Country | United Kingdom |
| Production | N/A |