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Using an iPhone to see planets #nasa #planets
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Meet Sagittarius A*: Milky Way's Supermassive Black Hole
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This Is the Closest Black Hole to Earth, and You Can See It with a Simple Telescope
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The Size of Space in 60 Seconds
3:33:25
Size, Distance, and Time in the Universe | Soft-Spoken ASMR (3.5 Hours)
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Earth vs. Venus: Twin Planets But Unique Stories
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The Biggest Planet Ever Discovered
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Our Cosmic Crew | Which is Your Favorite Planet?
