I recommend getting your friend a telescope or a star chart. Both will allow her/him to explore the cosmos in more detail and gain a deeper understanding of the universe. Alternatively, you could get her/him books on cosmology, such as "Cosmos" by Carl Sagan or "The Fabric of the Cosmos" by Brian Greene. These books will provide your friend with a wealth of knowledge and insight into the fascinating world of cosmology. Finally, you could also consider getting her/him a subscription to a science magazine, such as Discover or Astronomy, which will allow her/him to stay up-to-date on the latest news and developments in the field of cosmology.
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