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“prominent lines in the star’s spectrum these will show up. Likewise, if there is a planetary nebula or a bright emission nebula in the field these will only show as small points (due to the fine emission lines of the gases involved) rather than a spread out spectrum. This makes the grating a handy tool for finding faint planetary nebula. (See Chap. 7 for more detail.)”
― Grating Spectroscopes and How to Use Them
― Grating Spectroscopes and How to Use Them
![By Ken M. Harrison - Grating Spectroscopes and How to Use Them (The Patrick Moore Prac (2012) (2012-03-17) [Paperback]](https://i.gr-assets.com/images/S/compressed.photo.goodreads.com/books/1696911386l/198541031._SX98_.jpg "By Ken M. Harrison - Grating Spectroscopes and How to Use Them (The Patrick Moore Prac (2012) (2012-03-17) [Paperback]")
