I bought a Nikon P900 to partially supplant my "big" camera, a Canon 7D with a 500mm zoom. The Canon setup was 800mm equivalent, and weighed 7 pounds. It was also nearly impossible to shoot video with handheld, and still tricky on a tripod.
The P900 is not a perfect solution, but it's still very good, especially for video. It's effective 2000mm optical zoom, and has an electronic viewfinder, and only weighs two pounds, meaning it's easy to shoot video handheld in the sun.
This one was shot using a tripod:
And it's great for regular close-up contrail shots.
And photos of the moon: