Sky Puzzle

Every piece in this puzzle is a real galaxy. Sky Puzzle is built from two telescopes. Herschel mapped huge patches of the sky in far-infrared light and found thousands of dusty galaxies from when the Universe was young — but it saw them as blurry blobs. ALMA then zoomed in on the brightest of them and found that many are gravitationally lensed: bent into rings, arcs and multiple images by a galaxy sitting in front. Your job is to put each ALMA snapshot back where it belongs on the Herschel sky. Each unfound galaxy shows as a faint preview at its true position; match the shape, drag the piece there, and it snaps home. POINT IT AT THE SKY Hold your phone up and the screen shows the real sky in that direction — stars, constellations, the Milky Way, and the six Herschel survey fields drawn where they truly are above you, right now. The circle shows honestly how sure the compass is; drag the…