The former marked the first time a nova's spectrum had been photographed, while the latter eventually reached magnitude 0.2 to become the brightest nova in history since the supernova SN 1604, though it was later topped by Nova Aquilae 1918.
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He also discovered through research that the 3rd-magnitude star Theta Eridani had been described as 1st-magnitude by Ptolemy and al-Sufi.
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