{"product_id":"retrogra-apparent-retrograde-motion-pixel-sticker","title":"Retrogra – Apparent Retrograde Motion Physics Sticker","description":"\u003cp\u003eMeet Retrogra, a Mars who is not really going backwards. About every 26 months Earth overtakes her on the inside track, and for a few weeks she seems to drift backwards against the stars, then carries on. The art draws a schematic loop in code. Pixel-art kiss-cut sticker in 2, 3, 4 and 6 inches; equation, symbols and sources in the physics panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"2\" × 2\" \/ White","offer_id":50657789018215,"sku":"17614131807047429379","price":4.99,"currency_code":"USD","in_stock":true},{"title":"3\" × 3\" \/ White","offer_id":50657789050983,"sku":"29572482373176355065","price":6.99,"currency_code":"USD","in_stock":true},{"title":"4\" × 4\" \/ White","offer_id":50657789083751,"sku":"71710463164916918854","price":8.99,"currency_code":"USD","in_stock":true},{"title":"6\" × 6\" \/ White","offer_id":50657789116519,"sku":"27966091473120269308","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/01_clean_37c11e83-e318-4e68-bf1f-cb53d2253cae.jpg?v=1792791392","url":"https:\/\/pixelatedphysics.com\/products\/retrogra-apparent-retrograde-motion-pixel-sticker","provider":"Pixelated Physics","version":"1.0","type":"link"}