NGC 19 9 9: N ASA / ESA / HUBBLE HERITAG E TE A M (STSCI / AUR A); HD 44179: N ASA / ESA / H A NS VA N WINCK EL (CATHOLIC UNIV. OF LEU V EN, BELGIU M) / M A RTIN COHEN (UNIV. OF CA LIFOR NIA , BERK ELE Y ) p DARK HOLE I love the dramatic contrast in this Hubble image of reflection nebula NGC 1999. Infrared observations suggest that the dark region is not a dense cloud, as once thought, but an actual hole in the nebula. t HD 44179 I always feel taken aback when I look at this image of the Red Rectangle protoplanetary nebula, produced by the dying star HD 44179. I am so used to seeing curves in nebulae that it's striking to see such straight lines and angles. sk yandtelescope.org * APRIL 2 02 0 17http://www.skyandtelescope.org