smooth space curve

HELIX
WordClue
ARCswoop, curve
BOWcurve, arc
BENDcurve
LAWNopen space between woods
TERMspace of time
VOIDempty space
CUBBYsmall, confined space
CIRCLEsimple curve of Euclidean geometry
MUSCLEsmooth or sartorius
VOLUMEquantity of three-dimensional space
BETWEENinterval, space
MARINERamerican space probe
ODYSSEY2001: A Space ... (film)
PIONEERamerican space probe
STATIONrailroad or space
VOYAGERamerican space probe
EXPLORERamerican space probe
INTERVALdistance in space
MOVEMENTbetween points in space
UNIVERSEtotality of space and all contents
MUSCLEsmooth or sartorius
MESSAGESMS