21 September 2015
- 11:3511:35, 21 September 2015 diff hist −23,098 Heliostats Blanked the page
- 11:3411:34, 21 September 2015 diff hist −8,960 Heliostats →Types of gays
- 11:3211:32, 21 September 2015 diff hist +7 Heliostats No edit summary
- 11:3011:30, 21 September 2015 diff hist −5 Heliostats →Types of Heliostat
- 11:2811:28, 21 September 2015 diff hist +45 Heliostats →Some More Technical Details