A nearly face-on grand-design spiral, often cited as the most challenging Messier object to observe due to its very low surface brightness spread over a large area. Deep imaging rewards the effort — the two well-defined spiral arms and knotty HII regions are beautiful.
Star field and catalogued objects inside the plate-solved field, oriented to the solve. Fully offline, from the bundled star and deep-sky catalogues.
Interactive sky chart centred on 1 36 50.0 +16 03 17. Drag to pan, scroll to zoom, click a star or object to identify it. Zoom in to the plate-solved field for the DSS survey photo; zoom out for constellation figures and neighbouring catalogue objects. Fully self-hosted: the star and deep-sky catalogues and the survey image are all served from this site, so nothing external loads. Imagery: DSS2 colour (STScI / POSS-II). Constellation figures © Dominic Ford (GPLv3).
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