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The editors of Sky & Telescope make every effort to provide accurate information, but errors do sometimes slip through. We correct all mistakes online as well as printing corrections in the magazine. So if you see something questionable in the magazine, check below to see if it's a known problem.
This article lists all known errors in issues of Sky & Telescope for 2026. See also the errata listings for other years.
January 2026
Page 14: Victor van Wulfen, referenced in “Exploring Sidney van den Bergh’s Reflection Nebulae,” wrote the Clear Skies Observing Guides (clearskies.eu).
Page 34: In “Fly Me to the Moon,” NASA pays around $1 million/kg, or $500 thousand/Ib, for science payloads.
February 2026
Page 78: The star HD 217591 was reemerging from behind the Moon rather than about to be covered.
March 2026
Page 34: “Cracks in Cosmology” incorrectly stated that the first atoms formed in the primordial plasma 380,000 years after the Big Bang, at a temperature of around 3000 kelvin. These numbers are true for hydrogen, but neutral helium atoms actually formed earlier and at a higher temperature.
MAY 2026
Page 47: Click on the images to download the corrected planet chart and lunar libration diagram.
July 2026
Page 62: During the editorial process for “The Big Role of Small Observatories,” we unwittingly lengthened the life of William Parsons, the Third Earl of Rosse. The “Lord Rosse” who visited Lick Observatory in 1891 was Laurence Parsons, the Fourth Earl of Rosse.
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