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4 hours, 46 minutes • first pub 2019 (editions) user-added
ISBN/UID: None
Format: Audio
Language: English
Publisher: Not specified
Publication date: 25 September 2020
Description
All the matter and light we can see in the universe makes up a trivial 5 per cent of everything. The rest is hidden.Since the 1970s, astronomers have been aware that galaxies have far too little matter in them to account for the way they spin arou...
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4 hours, 46 minutes • first pub 2019 (editions) user-added
ISBN/UID: None
Format: Audio
Language: English
Publisher: Not specified
Publication date: 25 September 2020
Description
All the matter and light we can see in the universe makes up a trivial 5 per cent of everything. The rest is hidden.Since the 1970s, astronomers have been aware that galaxies have far too little matter in them to account for the way they spin arou...