Despite the thousands of reports of unidentified flying objects made yearly around the world, there are a few commonalties in the sightings. Regardless of shape, many UFO's give off their own luminescence. This is thought to be caused by ionization of the air surrounding the surface or possibly vents on the craft. It is believed to work similarly to what occurs inside a neon light tube. This is usually of an orangish or yellow color when seen at night. It also explains the hazy, wavering appearance of UFO's during daylight.

By far the most common shape of a UFO is the ubiquitous "saucer" or "disk" shape. Often the craft will appear to have a flat bottom or a slightly convex hollow. These are the one's described as "hubcaps". Occasionally there will be a more pronounced upper hemispherical shape. A type of dome or "transparent cockpit" shape is reported on the top of the round, spinning craft. These "classic" flying saucers are the usual model for cartoons containing "little green men".

Other saucers show a less detailed shape. Many reports come in about the lenticular saucers that appear to be two shallow bowls glued together at the rim. They are usually dark, greyish to black and, like the 2006 O'Hara Airport sighting in Chicago, USA, can be described "like an M&M candy".

The "straw hat" flying saucers are generally described as being like a coin with a rim. Rising above this edge is usually a secondary superstructure that gives them their distinctly hat-like appearance. They have occasionally been reported as looking like two hats glued together at the rim. The bottom and top of these craft are generally very noticeably flat.

Falling into this category is also the anomalous "mushroom" shaped UFO's like the alleged "Gulf Breeze, Florida saucer. The bell-shaped saucers also fit here along with the ones that have been described as "an upside down coffee cup in a saucer".

These are generally the most maneuverable of all the unknown flying objects. They seem to be able to defy not only gravity but motion, speed and inertial forces as well. While they are known to hover quite well, they also are known for such amazing maneuverability as to rip a conventional craft to bits. They are usually described as rotating or spinning along their horizontal axis when seen close enough to detect the motion. On can only assume it is merely the outer rim that spins while the central core containing possible pilot and crew remains stable.

Since 1957 Scandinavian UFO hunters have collected 15.000 reports about unusual heaven phenomena.

None of them can with safety be said to be spacecrafts.

The art exhibition “UFO” was displayed at the City hall square in Copenhagen in 2002 Scandinavian UFO Information has received 15.000 reports about possible UFOs for 50 years.

But none of the many unidentified, flying objects – referred to as UFOs - have appeared to be spacecrafts from foreign planets.

UFOS are mis-perceptions
Instead most observations have been natural phenomena, which may have been strengthened by the observers' fear or notion of UFOs from for instance the film's world.

It's the conclusions on the organization's work after the half century investigating the possible UFO observations.

They will publish a report in November about the attempts at finding out about what it really is, the witnesses have seen.

Natural impressions are reinforced by the witnesses
It is indicated that their observations have often made an impression so big that they are perceived very intense and far away from reality.

The set is misinterpreted, thus it fits into the public's notion of how a correct UFO really looks, the report concludes.

An example is according to “UFO information” a stage crash, which is seen as a cigar-shaped vessel with windows down alongside - the observation is so to speak "coloured" by the witnesses' notion of how a UFO ought to look.

Therefore UFO OBSERVATIONS are as a rule Ifos - identified, flying objects - that have only been miss-perceived by the witnesses.

No proof of extraterrestrial visits
There isn't any documentation that as much as a single one of the in-reported observations must originate from outer space concludes “UFO information”.

"Now we have used so many years after all and had so many reports and analyzed so much, and there isn't anything that proves that we got visits from space. It's more probable that it's something else".

"There isn’t anything in our report, which point precisely at it. It's important to emphasize that there aren’t one, but many explanations to these phenomena. Our experiences point to some natural conditions".

Flying discs are a name assigned to unidentified flying objects known as UFOs. The name flying disc or flying saucer was invented in late 1940´th when there were reportings of flying saucer shaped objects. The term soon became poplar and the numbers of sightings increased drastically the following years and other names like the flying pie plate or the half moon shape flying object were also used.
The common belief of how alien spacecrafts looked like became very standardized around that time (primarily in the 50’th). Aliens were mostly believed to be Martians and their spacecrafts would be metallic disc shaped with running lights all the way around them. This was also the way UFOs were illustrated in comic magazines and in movies and the flying saucers were surrounded with mystery and stories. Later the flying discs or flying disk have been replaced by more advanced spacecrafts in movies and magazines. Therefore the flying saucer is mostly used ironically now days as a nostalgic view back to the 50’th.
But actually the disc shaped UFOs are not just a 1950’th phenomenon it goes way back. All the way back to the middle ages when saucer shaped objects were illustrated in biblical texts. It is not known if those illustrations have a deeper meaning or if they are indeed real flying saucer sightings.
Many believe that the flying discs are a part of human imagination, but despite of the lack of proves of their existence authorities have never ignored the fact that they actually might be real. Already in the 40th the air force began investigating UFOs and the many flying disc reportings. Those investigations with a professional assigned staff were a part of the air force up until the 70th. The case that enjoyed most attention from the public was the one from Roswell where the air force said they had found a flying disc which they stored in an old barn.
The flying saucers have inspired humans in different ways. People have always been fascinated by the disc’s manoeuvrability and there has been invested a lot of money in manufacturing real flying discs that could transport a human being. The army has been very interested in inventing high technology flying saucer shaped vehicles that could replace the jeep and the helicopter. But so far none have succeeded in producing any flying discs that could lift itself more than a few feet from the ground. Attempts on making unmanned flying discs have been more successful, now days mostly known from the toys category like the remote control flying saucer.
In spite of the fact that more people carry cameras like the cell phone cameras and digital cameras fewer flying disc sightings have been reported lately. It could be interpreted as the decreasing popularity of the flying saucers, but it could also be explained because of the many technologies we possess today that can reveal fake photos. Today UFO pictures are analyzed and mostly revealed as fake or just explainable (like natural hoaxes, clouds, birds, planes, balloons and so on), but that being said many photos have never been proven fakes.

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