I have seen video-graphic and photographic presentations of stars in outer-space which are described as DARK MATTER. You-tube Link: https://rubinobservatory.org/gallery -- There are many philosophical questions about the space observations since ancient times glass telescopes. It's a virtual reality of glass technology. A mirror shows a likeness that pleases one's own imaginations. Can you trust a telescope to decide about showing a truth, reality and fact? Also, can you trust a camera to decide about showing a truth, reality and fact and that means a spiritual matter? My own observations on telescope and mobile phone camera has proven to me that the dark night is really not what is viewed on telescope and camera. Many facts are missed or omitted in it. The technology captures as a job it is programmed or fixed to do. It doesn't capture mist and wet weather in the night. It doesn't capture small particles in the air and environment of the night. It doesn't show whether it is a cold night or a hot night. Physical world is completely different. Walking at night we see the environment as we see it during the day, the only difference is that the environment of not bright, it is asleep. What you describe as Dark Matter might be more correctly described as Night in Space. The telescope and camera focus view shows some objects which are physically not there in existence, they are reflections from light on it's glass and these can be printed on paper or electronic digital files. Such superfluous or supernatural additional objects viewed were sparkles and brilliant shinning spikes on the stars and planets, red circular dots, white circular dots that looked like an additional star and planet. Is that mirror image of the star or planet originally captured on the glass?