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इस तारे के कारण बना है NASA, ना होता तो नहीं होती ऐस्ट्रोनोमी The Amazing Science Of Cepheid Stars
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Cepheid Stars are the backbone of astronomy, without them we can't even know how our universe was made, how big it is and how many galaxies are in there?
The Cosmic Border - https://youtu.be/fz5dAuDrBes
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Footage Credits - NASA, ESO and ESA
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