Holy cow. yeah, you USED to be "into" astronomy. This is unbelievably retarded. They're not re-using pictures. They're taking photos of the same stellar objects/areas that measure change very slowly.
These areas are changing, however. Look at how the Horse's Head Nebula has changed just since Hubble started. In 30 years, it might not even exist.
Holy cow. yeah, you USED to be "into" astronomy. This is unbelievably retarded. They're not re-using pictures. They're taking photos of the same stellar objects/areas that measure change very slowly.
These areas are changing, however. Look at how the Horse's Head Nebula has changed just since Hubble started. In 30 years, it might not even exist.
https://www.youtube.com/watch?v=pobxRfktJuw
https://www.youtube.com/watch?v=KwOoTfjqv34