Assertion: nebula's spectrum | /r/HasProperty | peculiar
Facets:
Source sentences:
text: The radiation emitted by the planetary nebula is remarkable because of its peculiar spectrum, as was discovered for the planetary nebula NGC 6543 (also known as Cat Eye Nebula) by the English amateur astronomer and pioneer of astronomical spectroscopy, William Huggins, on August 29, 1864 and published in the Philosophical Transactions of the Royal Society of 1864 and later in the Nineteenth Century Review of June 1897 - according to Hynes (1991):