As NASA continues its race to find alien life by next 20 years, people on earth continue to sight extraterrestrial activities with their naked eyes.

Antonio Urzi Simona Sibilla from Milan, Italy, claims to have spotted a huge UFO in the sky. Without wasting any time, Sibilla caught the entire extraterrestrial action in his camera.

The video, uploaded on YouTube, shows mysterious lights emitting from a supposedly super structured UFO.

The visitors to the video were amazed to see the strange lights, while others suspected it to be some sort of technical tampering to create the impression of an unidentified flying object.

One viewer of the video commented, "Amazing!! this is most beautiful UFO for me".

"Hopefully it's like Star Trek and their mission is to observe," other users wrote.

Some viewers also suspected it to be fake and commented: "If it's a fake (which totally could be), it's very well done. Congratulations to the infografists and compoitor in that case. In the other case it's real, I'm quite interested of the maximum focal length of the apparatus it's been used."

One more user suspected the video to be a space junk glittering in sunlight and wrote, "What about the possibility that it is just some fire-proof highly reflective space junk that has come off a space station or satellite and is floating it's way down to earth? I'd love to think it's aliens too."

Meanwhile, another person claims to have spotted a flying UFO in Ukraine while taking pictures of the sky, UFO website Mufon reported.

The witness claimed that he hears no noise or light to classify the flying object as a human-made object.

"Noise and high light was not observed," the witness told the website. "Around the object there is a discharge of air, like plasma."

A Ukraine witness at Izmail reported that a UFO appeared in two photographs taken less than six seconds apart with no sound or light being observed, according to testimony in Case 58570 from the Mutual UFO Network (Mufon) witness reporting database 1 August.

The witness stepped outside onto a balcony about 6:31 a.m. on July 14, 2014, where he got the idea to take two photographs of the sky about six seconds apart from each other.