Even when the sky is dark, there is always a __________.
constellation
speck of light
spacecraft
Moon
We have the earth engulfed in _______ which in touching the surface of the earth touches the surface of water.
planet
brightness
telescope
darkness
A _______ ago genetic codes were certainly unknown.
generation
decade
specks of light
century
NASA _______ rockets into space.
generates
innovates
launches
observes
