The best camera is the one that you have with you.
If you're new to photography, I'd recommend whatever the cheapest camera you can find is. Take 5 or 6 thousands shots with it and learn composition. When you've done that, then you will probably want something a bit more powerful. At that point an entry level dSLR with a quality lens is something to consider.
Learning to work around the limitations of your gear is the thing which separates the pros from the wannabes. It will also allow you to focus on learning composition in a really deep way. Before you get a lot of flexibility to distract from the practice.
The main thing you get with a more expensive kit, is more flexibility. I learned photography on a Canon Powershot S10. My good body is a Canon EOS10D, but I use a Canon Powershot sx40HS at the present, because I couldn't take that much gear with me on my present trip.
Check out this, that helped me alot and i mean it just depends if you want to shoot film or digtal. also nikon have the 1 series they are fully adjustable with shutter speed and iso and aperture and they are really cheap (compared to a fully DSLR camera.) [link] . it is also worth considering what you want to shoot, there is no point in getting a full framed sensor if you only going to shoot small format stuff (because full framed senors are more expensive.)
If you’re looking to do sky photography, you’ll likely want to shoot moderately wide, and you’ll want to have a moderately deep focus in your shots. Using a point-and-shoot, with its smaller sensor, will help you achieve that. Sky photos also tend to feature a wide tonal range, particularly at sunrise and sunset, so it’d be helpful to have something that can capture in RAW. Ideally, it should be able to accept filters for the lens, but if you can shoot in RAW and bracket exposures, that’s less vital. I would recommend something like the Canon Powershot G12.