p RECTANGUL AR GATHERING p BIG SPOT Bruce Waddington Nicknamed "The Box," the compact galaxy group Hickson 61 includes (clockwise from top) NGC 4173, NGC 4169, NGC 4174, and NGC 4175. DETAILS: PlaneWave 12.5-inch CDK with a QSI 640ws CCD camera. Total exposure: 10.3 hours through LRGB filters. Barry Burgess After more than a year of scant solar activity, large sunspot group AR2738 appeared in mid-April, putting on a wonderful show for patient solar observers. DETAILS: Canon 7D Mark II DSLR camera with Rubinar 1,000mm f/11 mirror lens with solar filter. Total exposure: 1/125 second at ISO 800. IN THE KEYHOLE José Joaquín Pérez Deep in the middle of NGC 3372, the Carina Nebula, lies the variable star system Eta Carinae (center). North is toward the top right. DETAILS: f/3.8 Newtonian Astrograph with a Moravian G316200 CCD camera. Total exposure: 32 hours through color and narrowband filters. Gallery showcases the finest astronomical images submitted to us by our readers. Send your best shots to gallery@skyandtelescope.com. See skyandtelescope.com/aboutsky/guidelines. Visit skyandtelescope.com/gallery for more of our readers' astrophotos. sk yandtele scope.com * AUGU S T 2 019 77http://www.skyandtelescope.com/aboutsky/guidelines http://www.skyandtelescope.com/gallery http://www.skyandtelescope.com