I have attached an image showing 3 different types of unwanted "artifacts". It appears I have dust or fibers on my sensor because the squiggles (and maybe the dots) are there on two photos with different lenses (right?). Last year I tried to photograph a rare transit of the planet Mercury but couldn't tell what was dust and what was the planet, which was very disappointing. There is also some vertical bars at top left - is that maybe from the heat? It was about 32 Celsius. I also have some hard to see faint circular spots that are lighter than the surroundings. I have drawn arrows pointing to them. Are they some sort of flare from the sun? The lens in this case is a rather old telephoto lens 70 mm to 200 I think that my grandparents had on there single reflex. Can anyone tell me what all of these things are!?