Just for reference, here is the list of NASA science missions now flying: https://science.nasa.gov/missions-page?field_division_tid=All&field_phase_tid=29 http

Just for reference, here is the list of NASA science missions now flying: https://science.nasa.gov/missions-page?field_division_tid=All&field_phase_tid=29 https://science.nasa.gov/missions-page?field_division_tid=Al... The private sector would have no incentive and little ability to mount these missions.