Images to accompany Press Release from the AAS meeting in Washington, D. C., Thursday January 12 9:20 AM EST . ... Image 1: . CAPTION: Dark Galaxy VIRGOHI 21 has no starlight but radio waves from neutral hydrogen betray its existence. ... 100 pixels wide, JPEG . 300 pixels wide, JPEG . ... CAPTION: Neutral hydrogen gas streams between NGC 4254 (top left) and the Dark Galaxy VIRGOHI 21 (center right) in this image made from radio telescope observations at a wavelength of 21 centimeters. ...