30:Tdb8,function getMoonImageURLs(date = new Date(), southern = false) { /* ====================================================================== current_moon.js Include this in the head node of the page. ====================================================================== */ const moon_domain = "https://svs.gsfc.nasa.gov"; const moon_year = date.getFullYear(); const moon_info = { "2022": { northern: { jpg: "/vis/a000000/a004900/a004955/frames/730x730_1x1_30p/", tif: "/vis/a000000/a004900/a004955/frames/5760x3240_16x9_30p/plain/" }, southern: { jpg: "/vis/a000000/a004900/a004956/frames/730x730_1x1_30p/", tif: "/vis/a000000/a004900/a004956/frames/5760x3240_16x9_30p/plain/" }, febdays: 28, nimages: 8760 }, "2023": { northern: { jpg: "/vis/a000000/a005000/a005048/frames/730x730_1x1_30p/", tif: "/vis/a000000/a005000/a005048/frames/5760x3240_16x9_30p/plain/" }, southern: { jpg: "/vis/a000000/a005000/a005049/frames/730x730_1x1_30p/", tif: "/vis/a000000/a005000/a005049/frames/5760x3240_16x9_30p/plain/" }, febdays: 28, nimages: 8760 }, "2024": { northern: { jpg: "/vis/a000000/a005100/a005187/frames/730x730_1x1_30p/", tif: "/vis/a000000/a005100/a005187/frames/5760x3240_16x9_30p/plain/" }, southern: { jpg: "/vis/a000000/a005100/a005188/frames/730x730_1x1_30p/", tif: "/vis/a000000/a005100/a005188/frames/5760x3240_16x9_30p/plain/" }, febdays: 29, nimages: 8760 }, "2025": { northern: { jpg: "/vis/a000000/a005400/a005415/frames/730x730_1x1_30p/", tif: "/vis/a000000/a005400/a005415/frames/5760x3240_16x9_30p/plain/" }, southern: { jpg: "/vis/a000000/a005400/a005416/frames/730x730_1x1_30p/", tif: "/vis/a000000/a005400/a005416/frames/5760x3240_16x9_30p/plain/" }, febdays: 28, nimages: 8760 }, "2026": { northern: { jpg: "/vis/a000000/a005500/a005587/frames/730x730_1x1_30p/", tif: "/vis/a000000/a005500/a005587/frames/5760x3240_16x9_30p/plain/" }, southern: { jpg: "/vis/a000000/a005500/a005588/frames/730x730_1x1_30p/", tif: "/vis/a000000/a005500/a005588/frames/5760x3240_16x9_30p/plain/" }, febdays: 28, nimages: 8760 } }; if (!moon_info[moon_year]) { throw new Error("We don't have paths for that year yet."); } /* ====================================================================== get_moon_imagenum() Initialize the frame number. If the current date is within the year moon_year, the frame number is the (rounded) number of hours since the start of the year. Otherwise it's 1. ====================================================================== */ const year = date.getUTCFullYear(); const { moon_nimages } = moon_info[year]; const janone = Date.UTC(year, 0, 1, 0, 0, 0); let moon_imagenum = 1 + Math.round((date.getTime() - janone) / 3600000.0); if (moon_imagenum > moon_nimages) { moon_imagenum = moon_nimages; } const filename = "moon." + String(moon_imagenum).padStart(4, "0"); function moon_image_url(filetype) { const moon_path = moon_info[moon_year][southern ? "southern" : "northern"][filetype]; return moon_domain + moon_path + filename + "." + filetype; } return { jpg: moon_image_url("jpg"), tif: moon_image_url("tif") }; }31:[{"id":"461ed6e57c433c1cfab731e82cb125b34846f6c153efd50107c600d189b188ff04f2fdbaaa648f9aff063bc7dbb4be132cf7028c3a9f896ca3faa756000dd4e1","href":"https://static.observableusercontent.com/files/461ed6e57c433c1cfab731e82cb125b34846f6c153efd50107c600d189b188ff04f2fdbaaa648f9aff063bc7dbb4be132cf7028c3a9f896ca3faa756000dd4e1","name":"IMG_20220304_184745.jpg","type":"image/jpeg","lastModified":1660921731587.889,"size":2284376}] 2e:{"title":"The Moon Now","cells":[{"id":0,"value":"# The Moon Now\n## [NASA Scientific Visualization Studio: Moon Phase and Libration 2024](https://svs.gsfc.nasa.gov/5187/)\n\nA really nice render of the Moon phase (shadow on the moon) as it is about now. NASA publishes these images for each hour of the year, in several formats.\n\nFor now, that's all this notebook is. \n\nExpires at the end of 2026, unless updated with the NASA photo paths for the new year.\n","pinned":false,"hidden":false,"mode":"md"},{"id":4,"value":"

\n Visualizations by Ernie Wright at NASA Scientific Visualization Studio, Released on November 18, 2021. \n 👁 HD version (11MB .tif)\n

","pinned":false,"hidden":false,"mode":"html"},{"id":174,"value":"viewof date = Inputs.datetime({ label: \"Date (UTC)\", value: Date.now() })","pinned":false,"hidden":false,"mode":"ojs"},{"id":162,"value":"viewof southern_hemisphere = Inputs.toggle({\n label: \"Southern Hemisphere\",\n value: false\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":184,"value":"moonImageURLs = getMoonImageURLs(date, southern_hemisphere)","pinned":false,"hidden":false,"mode":"ojs"},{"id":150,"value":"## Ideas:\n* Make a [mini app](https://fopub.notion.site/App-to-take-fake-pictures-of-moon-e67c05fb0fe841c2aa696b9de4657167) that can position, blend, and composite the moon onto any JPG.\n* Bonus points if it works OK on mobile: pinch to scale, rotate, position.\n\n## Screen blend mode\nHere's a quick example of using \"screen\" blend mode to add a _super_ moon to a phone camera image of the moon. I used [Photopea](https://photopea.com), but this could be a single-purpose app.","pinned":false,"hidden":false,"mode":"md"},{"id":152,"value":"img_20220304_184745 = FileAttachment(\"IMG_20220304_184745.jpg\").image()","pinned":true,"hidden":false,"mode":"ojs"},{"id":103,"value":"## Code\n\nThis code forked from https://svs.gsfc.nasa.gov/4955 with light edits to make it work in Observable \n\nSuggestions welcome, for example:\n\n* inputs for date and hemisphere ✅\n* paths for other years (assuming the url scheme is the same)","pinned":false,"hidden":false,"mode":"md"},{"id":71,"value":"$30","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}