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Neil deGrasse Tyson
,
Chuck Nice
,
David Spergal
Alien Sightings with David Spergel
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About
In This Series
1
Telescopes that Rocked Our World
8
Free
2
Would You Be a Space Tourist?
2
Free
3
The Search for Aliens
2
Free
4
The Science of Star Trek
4
Free
5
Space Spin-Offs
Free
6
Summer Skies
Free
7
Travels in Time
2
Free
8
Exciting Times for Science
Free
9
Anniversary of Apollo 11
2
Free
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