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With this solar system creator you can easily generate a random solar system, complete with basic information on each planet, or choose to create your own, and add your own descriptions for each planet.
There are two parts to this tool. The first, seen directly below, is the randomizing version. Simply click the 'Randomize solar system' button, and it'll automatically generate a randomized solar system. Click any of the planets in it, and you'll be presented with basic information in the fields below the button. All this info can be edited if you'd like, but if you really want to customize everything, I recommend the fully customizable part further down below.
The randomized version also allows for the inclusion of blue stars, the exclusive use of blue stars, and for a specific amount of planets (up to 10) to be used. I will probably add more colored stars in the future, especially if there's a demand for it. I stuck to relative realism initially, but I imagine more colors would be useful for non-realistic purposes as well. Besides, it's not like these randomized models are accurate to begin with.
At the bottom of this tool you can create your own solar system. Simply click the star you wish, then add planets by clicking on the planet you wish from the various sub-menus. The planets will automatically be added to the canvas below it, and they can be dragged and resized as you wish.
You can select a planet by clicking it, an orange border will appear. You can then delete this piece, or add information for it in the text field below the buttons. You should see the field below the buttons grow when you select a planet. Simply click inside it, then type away.
You can toggle dragging and resizing on and off using the corresponding buttons. This makes dragging around tiny planets (or perhaps moons) much easier without accidentally resizing them again, for example.
Lastly, you can turn everything into a single image using the 'Turn to image' button. An image will appear below it, which can then be saved by right clicking it, and selecting 'Save image'. Note that the information you've entered for each planet won't be attached to this image, but you can easily print those using the 'print' button, or the print shortcut on your computer.