{"product_id":"s2-and-the-silent-mass-plate-035-physics-poster","title":"S2 and the Silent Mass – Plate 035 Physics Poster","description":"\u003cp\u003ePlate 35 speaks for itself: \u003cem\u003e“We weighed it with a single star.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eThe star S2 orbits the Milky Way's centre every 16 years. Kepler's third law applied to its orbit weighs the dark object there, Sgr A*, at about four million Suns.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eM = 4π² a³ \/ (G T²)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eM: central mass, kg\u003c\/li\u003e\n\u003cli\u003ea: semi-major axis, m\u003c\/li\u003e\n\u003cli\u003eG: gravitational constant, m³ kg⁻¹ s⁻²\u003c\/li\u003e\n\u003cli\u003eT: orbital period, s\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e4.15 million M☉ (GRAVITY, 2019). May 2018 pericentre: 120 AU, 7650 km\/s.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGRAVITY Collaboration, Astron. Astrophys. 615, L15 (2018).\u003c\/li\u003e\n\u003cli\u003eGRAVITY Collaboration, Astron. Astrophys. 625, L10 (2019).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 035, “S2 and the Silent Mass”: the pixel-art plate with its slogan “We weighed it with a single star.”, the key equation and the facts panel shown above. Pixelated Physics. Physics. Personified.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"9'' x 12\" (Vertical) \/ Matte","offer_id":50961892638823,"sku":"32570447151985674294","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50961892671591,"sku":"28377562420690354719","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50961892704359,"sku":"15919667125712460511","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50961892737127,"sku":"14594289378643926747","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50961892769895,"sku":"46672918625639727874","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50961892802663,"sku":"11208525495851085596","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50961892835431,"sku":"51058921983094417055","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50961892868199,"sku":"24871044819293889589","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50961892900967,"sku":"60552002585208526173","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/2219607900506850911_2048.jpg?v=1793633692","url":"https:\/\/pixelatedphysics.com\/tr\/products\/s2-and-the-silent-mass-plate-035-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}