Great God Jin, who knows micro-single lens, recently wanted to buy an a6000 and didn't know how to match the lens.

My suggestion is to buy Sony ILCE 6000Y kit (ILCE6000+ 16-50 lens +55-2 10 lens), about 5400 yuan.

In fact, all your requirements are met by telephoto lenses. Shooting the moon+shooting butterflies and bees+blurring, which is obviously the specialty of telephoto lens. Sony 55-2 10 is equivalent to 135 on ILCE6000. The focal length is 82-3 15mm, and the 300mm end can shoot very far. Of course, it's a little difficult for you to shoot the moon in ultra-high definition like those professional photographers (ILCE6000+55-2 10), but the moon with 2400W pixels and 300mm end will be quite good; Small insects such as butterflies and bees need a long focal length, otherwise they would have been scared away; As for blur, although the aperture of 55-2 10 is not large, the long focal length of 300mm and close-range shooting can also achieve a certain blur effect.

As for the star track you mentioned, flowers and plants can be photographed with 16-50 (telephoto can take close-ups of flowers and plants).

16-50 and 55-2 10 take into account the wide angle+medium focus+telephoto, and the price is within your requirements, but the obvious disadvantage is that it is more troublesome to change the lens, especially when traveling. If you follow your requirements, the best solution is to buy ILCE6000 with 18-200, so there is no need to change the lens. But you know, the price is much higher. It depends on your budget.