Wordbrain Themes Master Space Level 1
Answer: Asteroid, Universe, Mars
Wordbrain Themes Master Space Level 2
Answer: Supernova, Meteor, Alien
Wordbrain Themes Master Space Level 3
Answer: Vacuum, Astronaut, Pluto
Wordbrain Themes Master Space Level 4
Answer: Intergalactic, Silence
Wordbrain Themes Master Space Level 5
Answer: Uranus, Gravity, Mercury