People sometimes like to see things that aren't there, in some youtube accounts images from SOHO and Stereo are discussed as having UFO footage on them.
An example is the 21th May sungrazer comet , that mislead people not well informed, to think they are seeing a UFO going toward the Sun.
This kind of speculation does not help people to learn .
In wikipedia about sungrazing comets:
A sungrazing comet is a comet that passes extremely close to the Sun at perihelion - sometimes within a few thousand kilometres of the Sun's surface. While small sungrazers can be completely evaporated during such a close approach to the Sun, larger sungrazers can survive many perihelion passages. However, strong evaporation and tidal forces they experience often lead to their fragmentation.