Astronomy - USA (2020-06)

70 ASTRONOMY • JUNE 2020

READER GALLERY

Cosmic portraits

1. WHOSE TRIANGLE?
   This section of the Veil Nebula
   supernova remnant in Cygnus is
   often called Pickering’s Triangle. It
   was actually an employee of Edward
   C. Pickering’s, Williamina Fleming,
   who discovered the object on a
   glass plate she was examining at
   Harvard College Observatory. As
   was the custom of the time, the
   credit went to Pickering. Fleming
   also discovered the Horsehead
   Nebula and classified the first
   white dwarf, 40 Eridani B.

• Rodney Pommier

2. UP AGAINST A WALL
   These star trails above the ruins of
   a brick factory near Ragusa, Italy,
   were made by combining 250 four-
   second exposures at ISO 1600 taken
   every five seconds.

• Gianni Tumino

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