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Fig. 13


Extinction measurements for O stars in two H II regions: (left) the Orion Nebula, (right) M 8. The left image is from STScI press release 2006–01 (BV Hαiz) and the rightimage is from ESO press release 1403 (ugrHαi). North is towards the top and east to the left. The approximate physical scale is indicated in both cases.

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