Interested in high fidelity (HD) satellite imagery? How beautiful the planet we live in can only be seen from afar. Below we will see how you can download high resolution satellite images but also where you can find amazing educational tools to explore the geographical changes of our planet.
All three solutions below are free.
Η by clicking here Earth Explorer is owned by the US Geological Survey. The maps and images it has are of high resolution. The data concerns the country (and not only), but is detailed and very informative. 
Οι πληροφορίες συγκεντρώνονται από πηγές όπως το πρόγραμμα τηλεανίχνευσης Landsat καθώς και τις services NASA ground.
You can use a combination of query options to combine the United States Geological Survey (USGS) records and get the totals data.
The European Commission (EC), together with the European Space Agency (ESA), has the world's largest Earth observation program. 
Data from the Sentinel satellites is available at absolutely no cost through an open access hub on the website. You should perform enrollment to download HD satellite images.
High resolution images are offered to the public under a Creative Commons IGO license. The quality is better than the United States Geological Survey (USGS) images.
Take a look at Sentinel Hub Playground to download very high resolution images from Sentinel-2.
NASA's Worldview is a powerful application that lets you view high-resolution satellite images almost in real time. You can use the functions of the web page to set a timeline and download a data history. 
You can also try to see the Earth at night. What does the Earth look like after sunset and what are the areas with the lights? Download everything to your computer.
Of course there is that too Google Earth (but also Google Maps), but with the above websites you will enjoy much better resolution (HD) in the images you are interested in.
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