M7W1Voc

A trip that has a purpose, such as exploration or research

so amazing that it is hard to believe

to improve or to complete steps toward reaching a goal

records the time and order of a series of events

something that is very large

people such as sailors, who navigate ships

beyond Earth and its atmosphere

to go up

a rule that explains how something in the natural world works

metal object that was heated in a special furnace and hammered into shape