Observation is an activity undertaken intelligent creatures, with the intention to feel and then understand the knowledge of a phenomenon based on knowledge and ideas that have been previously known.
Biological sciences and astronomy have historical basis in observations by amateurs.
The person performing the observation referred to the observer.
The phenomenon of the Greek language; phainomenon, "what is visible", in the Indonesian language could mean that:
1. symptoms, such natural phenomena
2. things that are perceived by the senses
3. things mystical or occult
4. facts, facts, events
Adjectival derivative of the word, phenomenal, means: "something extraordinary".
Some of the phenomena encountered
1. UFO
2. Tunguska
3. Smoketrail
