It's not from outer space, but it sure does look like it.
In the 1950s, the Canadian Air Force wanted to create a vertical take-off and landing (VTOL) vehicle that could hover below radars, intercept enemy planes, and take off at high speeds. The VZ-9AV, with its unique saucer shape, was the proposed solution.
The designer, John Carver "Jack" Frost, designed the Avrocar to take advantage of the Coanda effect, a principle that dictates fluid follows a curve, to provide lift and thrust from one engine by blowing exhaust out of the rim of a circular aircraft.
Original designs and tests for the Avrocar suggested it would be able to fly at three times the speed of sound. As the building continued, the project became too expensive, and in 1958, the US government took over the remainder of the project's funding.
However, after months of research and design, the prototype was not even able to make a full ascension into the sky and only ever achieved a sustained hover three feet above the ground.
The design was eventually scrapped, and the aircraft was never revisited. In 2007, the aircraft was acquired by the National Museum of the United States Air Force and has since been restored.