If I was going to seriously persue photography of high flying aircraft and distant objects, I would be very tempted to get a Nikon Coolpix P1000. Here's the first text of its feature description:
"Mind-blowing 3000mm zoom. 4K Ultra HD video. RAW (NRW), macro, time-lapse and so much more.
Imagine being able to zoom far beyond the reach of standard telephoto lenses, to capture not just the moon, but the craters, peaks and valleys of its surface. Imagine being able to view the International Space Station in flight, even the rings of Saturn—not with a telescope, but with a one-of-a-kind Nikon camera. Introducing the COOLPIX P1000, the most extreme zoom Nikon ever, and a game-changer for birders, sports and wildlife enthusiasts, travel photographers and even those aspiring to venture to the moon and beyond without leaving their backyard."
Nikon Coolpix P1000 product page: https://www.nikonusa.com/en/nikon-products/product/compact-digital-cameras/coolpix-p1000.html
What P1000 user did with one near the Japan Maritime Self Defense Force Base at Chichijima when a Shin Maywa US-2 was coming in:
https://www.youtube.com/watch?v=vI8_X8K5icI
https://www.youtube.com/watch?v=Pa4l6Ey-prA&feature=youtu.be