I saw this within the past 15 years on public tv. An astronaut is sent on a mission or maybe just his clones. They need someone to make observations of stellar phenomena but after this, the clone is flushed into space. I would like to know title/who created it.
Perhaps the 2000 short film Today's Life?
It runs about 7 minutes total for the first part (about 13 minutes overall) and matches several points in your description including clone termination, space exploration, etc.
"Today's Life is one of the few entertaining short films that's more about plot and less about symbolism. In just 13 minutes, it tells the story of a future NASA-like agency that sends out space ships filled with cloned astronauts to explore the far reaches of the galaxy. These clones are supposed to lack any memory of their life before being cloned, and function only as robots. This is an emotional story because both the main character and the audience knows that he is about to be "terminated" once he finishes the job. It's a highbrow story because it makes the audience question the morality behind human cloning. Are human clones simply disposable objects without a soul, to be thrown away when they are no longer needed?"