Oumuamua, an alien spacecraft ?

Under the Nasa’s Near Earth Object Observations program, University of Hawaii’s Pan STARRS1 telescope discovered the first known interstellar object visiting our solar system. Initially, the scientists thought it to be a usual comet, but observations denied it’s cometary activities as it slingshots past the sun at a whopping speed. The first sightings of the object date back to October 19, 2017.

The interstellar object is cigar shaped, has reddish appearance and spreads to a distance of 400 meters lengthwise, 10 times as wide as the length. The brightness factor of Oumuamua is 10, and as far as other asteroids or comets are considered, they vary as much as 4–5 when it comes to brightness factor. The length: width ratio is another aspect that differentiates Oumuamua from other interstellar objects.

The Hubble telescope tracked the object to be moving at 85,700 miles per hour relative to the sun. It was in late December that researchers at Harvard put the theory of ‘Oumuamua’ being an alien spacecraft. They are pretty
convinced about this hypothesis given that its high speed and unusual trajectory. The reddish, stadium-sized object has a flattened and elongated shape and it showed a very unusual non-uniform acceleration when it sped past our solar system in November 2017. The conventional asteroids and comets have uniform acceleration owing to the general gravitational forces. Moreover, this mysterious object has tumbling motion unlike the smooth rotation of comets and asteroids.
Others have denied the proposition of Oumuamua being an alien spaceship as with this tumbling motion, it’s almost impossible to keep an eye on other planetary objects and to its designated path as well. Well, the gist is that no one knows where this object came from and where will it go, and as on 19 April 2018, Oumuamua left our solar system, we can only wonder if Oumuamua was really an alien spacecraft.