Editing Jewel Box (star cluster)
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| doi = 10.1007/978-1-4419-0326-6 |
| doi = 10.1007/978-1-4419-0326-6 |
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| isbn = 978-1-4419-0325-9| series = Astronomers' Observing Guides |
| isbn = 978-1-4419-0325-9| series = Astronomers' Observing Guides |
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}}</ref> It is impressive when viewed with binoculars or a small or large |
}}</ref> It is impressive when viewed with binoculars or a small or large telescopes. Three members along the crossbar of the A-shaped asterism lie in a straight line known as the 'traffic lights' due to their varying colours.<ref name="Inglis">{{Cite book |
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| last = Inglis |
| last = Inglis |
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| first = Mike |
| first = Mike |