ACROSS
6 Below 0° (3-4)
7 US city, world headquarters of 3 down science (5,2)
9 Computing language; Beginner’s All-purpose Symbolic Instruction Code (5)
10 Component of atmospheric circulation (5,4)
11 The complete or partial obscuring of one celestial body by another (7)
13 In human anatomy, spaces surrounding the nasal cavity (7)
14 Term for the twinkling of stars (13)
18 In biology, relating to the body’s waste fluid (7)
19 Worker or machine that applies permanent mechanical fasteners (7)
21 In cosmology, the earliest stage of the big bang (6,3)
23 Female reproductive organ (5)…
