This 13,000 years old satellite were known as Black Knight Satellite, according to the stories, the signal was discover first by Nicola Tesla, it was repeating signal that coming from the space. but not until 1954 the satellite explanation were mention for that signal. but in the 50’s it was believe there were two satellite orbiting the earth but during that time there is no man-made satellites had been launched. it was In 1973 the Scottish writer Duncan Lunan analyzed the data from the Norwegian radio researchers, coming to the conclusion that they produced a star chart pointing the way to Epsilon Boötis, a double star in the constellation of Boötes. Lunan’s hypothesis was that these signals were being transmitted from a 12,600 year old object located at one of Earth’s Lagrangian points. but later he withdrew it because of the flawed data. it was in 1998 during the STS-88 mission An object had photographed has been widely claimed to be this “alien artifact”. However, it is more probable that the photographs are of a thermal blanket that had been lost during an EVA. Alternatively, people analyzing these pictures have suggested that it could be the Pakal Spacecraft, a supposed Mayan spacecraft written about by controversial pseudoarchaeological author Erich von Däniken. majority of people discredit this story as hoax and others still believe there is an alien satellite out in the earth orbit. You will be the judge.
1. Lenticular clouds (Altocumulus lenticularis)
stationary lens-shaped clouds that form in the troposphere, normally in perpendicular alignment to the wind direction. sometimes people refers it as UFO cloud because of the saucer shape of the cloud.
2. Roll Cloud
A roll cloud is a low, horizontal, tube-shaped, and relatively rare type of arcus cloud. Roll clouds usually appear to be “rolling” about a horizontal axis. One of the most famous frequent occurrences is the Morning Glory cloud in Queensland, Australia, which can occur up to four out of ten days in October, Coastal roll clouds have been seen in many places, including California, the English Channel, Shetland Islands, the North Sea coast, and coastal regions of Australia.
3. Shelf Cloud
A shelf cloud is a low, horizontal, wedge-shaped arcus cloud. A shelf cloud is attached to the base of the parent cloud, which is usually a thunderstorm, A shelf cloud usually appears on the leading edge of a storm, and a wall cloud will usually be at the rear of the storm.
4. Mammatus Cloud
mammatocumulus (meaning “mammary cloud” or “breast cloud”), is a meteorological term applied to a cellular pattern of pouches hanging underneath the base of a cloud. The name mammatus is derived from the Latin mamma (meaning “udder” or “breast”)
5. Noctilucent Clouds
Night clouds or noctilucent clouds are tenuous cloud-like phenomena that are the “ragged edge” of a much brighter and pervasive polar cloud layer called polar mesospheric clouds in the upper atmosphere, visible in a deep twilight. They are made of crystals of water ice. Noctilucent roughly means night shining in Latin. They are most commonly observed in the summer months at latitudes between 50° and 70° north and south of the equator. They can be observed only when the Sun is below the horizon.