Pismis 24
Pismis 24, a young cluster in Scorpius: one spire tapers to a point 0.14 light-years wide, and its brightest star turned out to be two.
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Pismis 24 is a young star cluster about 5,500 light-years away in Scorpius, at the core of the emission nebula NGC 6357. Its brightest member, Pismis 24-1, was once thought to weigh 200 to 300 Suns, which would have made it the most massive star known. A single star was believed to top out near 150. Hubble resolved it into two stars in 2006, now put at 74 and 66 solar masses.
A ridge of lit dust runs gold and tan under the star field. Spires stand off it, shaped by the radiation and winds off the young stars. The tallest in the frame reaches about 5.4 light-years from tip to bottom edge, tapering to a point 0.14 light-years across that softens into the white haze behind. More than 200 solar systems out to Neptune's orbit would fit that width.