Now dont have much time
which identifies a fact given in the speech

a-its conquest deserves the best of all mankind and its opportunity for peaceful cooperation may never come again\
b- the exploration of space will go ahead whether we join in it or not and it is one of the great adventures of all time and no nation which expects to be the leader of other nations can expect to stay behind in the race for space
c- whithin these last 19 mouths at least 45 satellites have circled the earth
d- if this capsule history of our progress teaches us anything it is the man in his quest for knowledge and progress is determined and cannot be deterred