336 



[chap. 16 



Fig. 10. Star clouds and ob- 

 scuring nebulosity of the 

 galactic center in the 

 Sagittarius-Scorpius region 

 of the Milky Way photo- 

 graphed on 23 April, 1961, 

 from R.V. Chain in lat. 01° 

 22' North, long. 17° 22' 

 West during the period 

 0430 to 0500 G.M.T. with 

 the same lens and equip- 

 ment used for Fig. 9. The 

 guide star was Rasalhague. 

 North is at the top. 



Fig. 11. A mosaic of the Milky Way from Deneb in Northern Cygnus to Sirius in Cams 

 Major made to demonstrate that astronomical photography is practicable at sea on a 

 routine basis. This mosaic is composed of 16 exposures, each of 15 min duration, 

 made from R. V. Chain in latitudes 12° to 14° north on the 65° west meridian during 

 the nights of 4th and 5th May, 1962, using a Schneider Xenon lens of 50-mm focal 

 length working at //2 on Tri-X film. The principal objects are from left to right: 

 Deneb, Vega, Altair, Scutum Sobieski, Sagittarius, Scorpio (Antares), a Centauri, 

 the southern coal sack, southern Cross, Argo Navis, Canis Major (Sirius). The Argo 

 region is faint because it remained low on the southern horizon. 



