Todays freebie is an armillary sphere picture and video.
Armillary sphere also known as spherical astrolabe, armilla, or armil is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic.
And today`s bonus - is rotating Armillary sphere video to enhance you historical programs and presentations!
Please give credit by using credit line
Video (or Picture) by Kira Makohon (AstroStore)
and link to original video or image (for web)