Appearance of UFOs and alien ships in the sky has always been a subject of discussion among conspiracy theorists, who claim that intelligent life may be trying to rule the Earth. However, critics continue to argue that no one has even visited Earth.

Recently, a mysteriously green ball was seen hurtling towards Earth and then crashing into it. The picture of the two weird "fireballs" was captured by cameras installed at the Niigata airport in Japan, according to The Express.

The team of scientists at the American Meteor Society have not yet released a statement confirming that it was a meteor crashing to Earth. However, they have indicated that if it was a meteor at all, it was extremely rick in nickel. Space rocks highly rich in nickel are known to glow in green upon burning.

However, the conspiracy theorists believe that it was actually a UFO that tried to disguise itself as a meteor to enter Earth. Scott C. Waring of the UFO Sightings Daily claims that the UFO tried really well to disguise itself, however, it made certain basic mistakes during the process.

First, the object glowed green, which is highly unlikely of a meteor. Secondly, no meteor flies so close too Earth, that too in an horizontal line.

In addition, Waring claims that one of the biggest mistakes that the aliens made was to turn off the lights of the main ship for one-tenth of a second. According to Waring, a silver ship detached and moved back from the main ship at that particular moment.

This is a huge mistake on the part of the pilot, who believed that the UFO can disguise as a comet and enter Earth's atmosphere. However, people from the scientific community believe that it could actually be space debris or a part of satellite falling from the sky.

This is not the first time that Waring has accused aliens of disguising their UFOs. Recently, the conspiracy theorist claimed that alien can also spray some substance around their ships to disguise it as clouds.