Wolf–Rayet star
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Wolf–Rayet stars, often abbreviated as WR stars, are a rare heterogeneous set of stars with unusual spectra showing prominent broad emission lines of ionised helium and highly ionised nitrogen or carb
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
WR 22 in the Carina Nebula
AB7 produces one of the highest excitation nebulae in the Magellanic Clouds.
Starburst galaxy
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A starburst galaxy is one undergoing an exceptionally high rate of star formation, as compared to the long-term average rate of star formation in the galaxy, or the star formation rate observed in mos
Wolf–Rayet star
…detected, from magnitude 21 to 25, and astronomers hope to eventually catalog over ten thousand. These stars are expected to be particularly common in the Wolf–Rayet galaxies named after them and in starburst galaxies. Their characteristic emission lines are formed in the extended and dense high-velocity wind region enveloping…
The Antennae Galaxies are an example of a starburst galaxy occurring from the collision of NGC 4038/NGC 4039. Credit: NASA/ESA.
Light and dust in a nearby starburst galaxy known as 2MASS J082354.96+280621.6
Artist's impression of a galaxy undergoing a starburst
SBS 1415+437 is a WR galaxy located about 45 million light-years from Earth.