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Name: Unknown, generally referred as the "Space Cannon" | Unknown, generally referred as just "Cylinder"
Origin: The War of the Worlds (H.G. Wells' original book)
Type: Interplanetary Delivery System | Space Pod/Projectile, Forward Base
In Use By: Martians
Needed Prerequisite for Use: Knowing how to operate Martian technology
Dimensions: Unknown | 30 yards (27+ meters) in diameter, length unknown
Destructive Capacity: Town level+ | Large building level+ with Heat-Ray
Range: Can target the Earth 140,000,000 miles away with strategic accuracy | Anything in its direct line of fire, at least up to 8+ kilometers
Projectile Speed: Sub-relativistic (can reach the Earth from Mars in less than 24 hours, about 1% of the speed of light)
Durability: At least town level | Multi city block level, town level+ if we include the whole body
Material or Element: Unknown | Metal (of unknown type)
Notable Features: High-powered space launcher cannon | Extremely durable space projectile/capsule that carries Martians onto other planets, has a tentacle arm mounted Heat-Ray that can surface from the capsule to attack enemies nearby, has an internal workshop with enough materials to build 5 Tripods and a few other vehicles.
Drawbacks: Can only fire once every 24 hours | It takes circa 12 hours for the cylinder to cool off so the Martians can leave. Immobile once impacted with the target.
Industrial Capacity: Can build 5 Tripods under 24 hours.
Notable Attacks/Techniques or Alternate Forms:

Other: It was implied that the Martians possess only one such space cannon, found on a specific point of Mars. It is unknown how the Martians planned to return to their planet after the attack or even if they wanted to. If they did then it's rather likely they possess the ability to create another Space Cannon under a reasonable amount of time.
 
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