| 11. | The star included strong absorption lines due to magnesium, aluminium, silicon, calcium iron and nickel.
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| 12. | Absorption lines are explicitly described as not being visible.
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| 13. | The first infrared observations were published in 1998, in which both absorption lines were discussed.
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| 14. | SN 2002cx was by then in the nebular phase, with emission lines dominating over absorption lines.
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| 15. | Cotton then became interested in the Faraday effect near absorption lines and demonstrated magnetic circular dichroism.
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| 16. | Shell absorption lines show variable radial velocities, possibly due to variations in accretion from the disk.
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| 17. | The Keck observations identified two such absorption lines, one of magnesium and the other of iron.
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| 18. | Better spectrography in the 1950s showed that and water vapor absorption lines did not overlap completely.
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| 19. | Such broadening of absorption lines is not seen in high-redshift objects, thus falsifying this particular hypothesis.
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| 20. | Its spectrum lacked any emission or absorption lines.
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