UFO AND IT MYSTERY

A UFO is an Unidentified Flying Object.

Since man first started looking up into the skies he saw things he couldn't explain. For the last fifty years or so these things have taken on the label "UFOs." Originally an abbreviation for the Air Force term "Unidentified Flying Object", it has become a synonym to most people for "Alien Spaceship." For the Air Force, though, it is simply a term to refer to something in the skies that the observer can see but not recognize. It is "Something seen in the sky (or on the land, or exceptionally in the water, but thought capable of flight) which the witness could not identify and thought sufficiently strange to report to either an official or unofficial investigating body".

A UFO is the stimulus for a UFO report made by a UFO witness. UFO researchers (often called UFOlogists) study UFO reports and witnesses. UFO researchers cannot directly study UFOs. There are some reports in the literature of different governments recovering craft thought to cause UFO reports, but most of these reports are speculative. The study of UFO reports is referred to as UFOlogy. This implies a scientific basis to the study, when in practice very little scientific research is carried out. After careful investigation about 90% of all UFO reports can be reasonably explained as either natural phenomena or misidentification of normal manmade devices. Sometimes the term IFO is used for these Identified Flying Objects. Those cases which are identified as natural phenomena are often rare or short lived and are worthy of study in their own right.

In the early days of investigation used interchangeably with the term 'Flying Saucer'. More recently the term Flying Saucer has fallen into disuse, although some researchers use it as a term to specifically refer to an extraterrestrial spacecraft.

THE GREAT MILKY WAY

The Milky Way is the galaxy which is the home of our Solar System together with at least 200 billion other stars (more recent estimates have given numbers around 400 billion) and their planets, and thousands of clusters and nebulae, including at least almost all objects of Messier's catalog which are not galaxies on their own (one might consider two globular clusters as possible exceptions, as probably they are just being, or have recently been, incorporated or imported into our Galaxy from dwarf galaxies which are currently in close encounters with the Milky Way: M54 from SagDEG, and possibly M79 from the Canis Major Dwarf). See our Messier Objects in the Milky Way page, where details are given for each object to which part of our Galaxy it is related. All the objects in the Milky Way Galaxy orbit their common center of mass, called the Galactic Center (see below).




As a galaxy, the Milky Way is actually a giant, as its mass is probably between 750 billion and one trillion solar masses, and its diameter is about 100,000 light years. Radio astronomial investigations of the distribution of hydrogen clouds have revealed that the Milky Way is a spiral galaxy of Hubble type Sb or Sc. Therefore, our galaxy has both a pronounced disk component exhibiting a spiral structure, and a prominent nuclear reagion which is part of a notable bulge/halo component. Decade-long observations have brought up more and more evidence that the Milky Way may also have a bar structure (so that it would be type SB), so that it may look like M61 or M83, and is perhaps best classified as SABbc. Recent investigations have brought up support for the assumption that the Milky Way may even have a pronounced central bar like barred spiral galaxies M58, M91, M95, or M109, and thus be of Hubble type SBb or SBc.