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Crash Course Crossword

Across
The process of igniting a fuel mixture.
Second planet in the solar system.
The first stage of a rocket allowing liftoff.
The envelope of gases surrounding a planet.
Directed or moving backward.
A noble gas used for ionic propulsion in modern satellites.
To consume fuel.
Change in velocity.
NASA's most famous rocket.
Down
Planet named after the Roman god of war.
Device on an engine that pivots in a direction.
A spacecraft designed to land on the surface of a planet or moon.
Operates as an aircraft in the atmosphere and a spacecraft in space.
When a rocket separates with ejection bolts.
A type of chemical carried in a tank which helps fuel burn.
A funnel shaped device towed by a rocket to reduce speed and increase stability.
The carrying capacity of the spacecraft.
A curved path of a celestial object or spacecraft.