The BE-7 engines for the Blue Moon Mk1 lander. Dual expander cycle using LH2/LOX. Specs are 10,000 lbf (44,000 N) and 460s isp. BO hopes that when water resources are developed on the Moon, it can be refueled on the surface.
's moon Enceladus may be able to support life, with additional complex organic molecules identified from the geyser-like jets of ice grains that spew into space from this small icy world's subsurface ocean.