Deletion of Detecting Earth from distant star-based systems

Comment: The focus of the article is currently narrow but this is not a reason to delete.  The narrow focus arises from the source which has provoked it.  As more sources are consulted then we might expect the topic to flesh out.   So, do such sources exist? It turns out that they do as here's an entire book on the subject – ''https://books.google.co.uk/books?id=qLuVCJtRTV0C The Earth as a Distant Planet''.  This demonstrates the potential of this article, which has only existed for 1 day.  Per , "''If editing can improve the page, this should be done rather than deleting the page.''"  See also 
Stance: keep
Cited policy: Wikipedia:Deletion policy (WP:ATD||WP:BITE)