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History
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WR 136, a WN6 star where the atmosphere shed during the red supergiant phase has been shocked by the hot, fast WR winds to form a visible bubble nebul
WR 136, a WN6 star where the atmosphere shed during the red supergiant phase has been shocked by the hot, fast WR winds to form a visible bubble nebula
GK Persei (Nova Persei 1901), which showed Wolf–Rayet features in its spectrum
GK Persei (Nova Persei 1901), which showed Wolf–Rayet features in its spectrum
WR 22 in the Carina Nebula
WR 22 in the Carina Nebula
AB7 produces one of the highest excitation nebulae in the Magellanic Clouds.
AB7 produces one of the highest excitation nebulae in the Magellanic Clouds.
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Helium
Helium
Sir William Ramsay, the discoverer of terrestrial helium
Sir William Ramsay, the discoverer of terrestrial helium
The cleveite sample from which Ramsay first purified helium
The cleveite sample from which Ramsay first purified helium
Historical marker, denoting a massive helium find near Dexter, Kansas
Historical marker, denoting a massive helium find near Dexter, Kansas