Keywords: AladinDNe2011.02.25-23-22-24.897.png en The image is a plot of dark nebula DNe over the error box of Serpens XR-2 Credit Aladin at SIMBAD Me using Aladin at SIMBAD url http //simbad u-strasbg fr/simbad/ Me and Aladin at SIMBAD 2011-02-25 I sent an email to question simbad u-strasbg fr regarding use of applet Aladin generated sky plots Pierre Fernique astro unistra fr stated There is absolutely no problem to use them for Wikipedia pages A citation of Aladin would be appreciated Legend x - astronomical X-ray source DkNb - dark nebula HMXB - high-mass X-ray binary LMXB - low-mass X-ray binary Cc-zero X-ray astronomy Astrometry Nebulae |