Le site itelescope.net est-il sûr ?

The best automated telescopes on the internet. Period. They're not cheap to use, but you get every cent worth of what you spend. And, if you don't, they cheerfully and quickly refund your money for the unacceptable image. Excellent support. These are world class observatories. Lots of filters and resolutions, so you can do most anything a pro using a major observatory can. Only limitation is that you can't do any planetary imaging. Not disallowed, just the wrong kind of equipment for that. That would be my only suggestion, that they get a planetary telescope for each observatory.