Fill in the blank: There _____ be oxygen on planets in other galaxies.
may be
The act of passing on old beliefs to next generation of people
Traditions
Grammar: word used when something is more likely to happen
may
Group of stars held together by gravity
galaxy
A stiff, sharp-pointed thing on a stem
a thorn
What's this?
It's a comet.
All of the people born and living at about the same time
generation
Means outside of Earth (adjective word)
Extraterrestrial