The following images are modified as per use:
License: Public domain
1. mercury.png: https://en.wikipedia.org/wiki/File:Mercury_Globe-MESSENGER_mosaic_centered_at_0degN-0degE.jpg by NASA-APL
2. venus.png: https://commons.wikimedia.org/wiki/File:Venus_globe_-_transparent_background.png by NASA
3. earth.png: https://commons.wikimedia.org/wiki/File:The_Blue_Marble.jpg
4. mars.png: https://commons.wikimedia.org/wiki/File:Mars_Hubble.jpg by NASA and the Hubble Heritage Team
5. jupiter.png: https://commons.wikimedia.org/wiki/File:Jupiter_(transparent).png
6. saturn.png: https://commons.wikimedia.org/wiki/File:Saturn_during_Equinox.jpg by NASA/JPL/Space Science Institute
7. uranus.png: https://commons.wikimedia.org/wiki/File:Uranus.jpg by NASA/JPL
8. neptune.png: https://commons.wikimedia.org/wiki/File:Neptune.jpg by NASA/JPL
9. sun.png: https://commons.wikimedia.org/wiki/File:The_Sun_by_the_Atmospheric_Imaging_Assembly_of_NASA%27s_SolarDynamics_Observatory_-_20100879.jpg by NASA/SDO
