
1) Impact crater on Venus
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https://www.crosswordclues.com/clue/balch

Balch is a surname that may apply to: ==Other uses== ...
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http://en.wikipedia.org/wiki/Balch
[crater] Balch is a crater on Venus at latitude 29.9, longitude 282.9 in Devana Chasma, Central Beta Regio. It is 40 km in diameter and named after Emily Balch, though it was originally designated Somerville crater. This crater is one of the few examples of tectonically modified craters seen on Venus. The absence of such craters indicates a...
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http://en.wikipedia.org/wiki/Balch_(crater)

The USS Balch was an American Porter Class destroyer of 1850 tons displacement launched in 1936. The USS Balch was powered by four Babcock and Wilcox high pressure oil-burning boilers providing a top speed of 39 knots. She carried a complement of 175 and was armed with eight 5 inch guns; eight 1 pdr guns; two machine-guns and eight 21 inch torpedo ...
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http://www.probertencyclopaedia.com/browse/RB.HTM

Emily Balch (1867-1961) American economist, Nobel Laureate.
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https://pds.jpl.nasa.gov/planets/special/glossary.htm
No exact match found.