{"id":1088,"date":"2023-12-27T00:14:00","date_gmt":"2023-12-27T00:14:00","guid":{"rendered":"https:\/\/science.gsfc.nasa.gov\/stella\/?p=1088"},"modified":"2025-07-05T02:58:32","modified_gmt":"2025-07-05T02:58:32","slug":"solar-eclipse-activity-comparing-measurements-during-changing-light-levels","status":"publish","type":"post","link":"https:\/\/science.gsfc.nasa.gov\/stella\/solar-eclipse-activity-comparing-measurements-during-changing-light-levels\/","title":{"rendered":"SOLAR ECLIPSE ACTIVITY: Comparing Measurements During Changing Light Levels"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1088\" class=\"elementor elementor-1088\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6adcb2a e-flex e-con-boxed e-con e-parent\" data-id=\"6adcb2a\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fdd9cad elementor-widget elementor-widget-heading\" data-id=\"fdd9cad\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SPECTROSCOPIC MYSTERY: Decoding Materials with the STELLA Spectrometer<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0d04ae2 e-flex e-con-boxed e-con e-parent\" data-id=\"0d04ae2\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-408023e elementor-widget elementor-widget-heading\" data-id=\"408023e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Objective:\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d697cca elementor-widget elementor-widget-text-editor\" data-id=\"d697cca\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The main objective of this classroom activity is to introduce students to the concept of spectroscopy and spectral signatures using the STELLA spectrometer. By engaging in a guessing game, students will learn to associate spectral patterns with different colored materials and understand the potential applications of spectroscopy, such as detecting plant health.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0b8827c elementor-widget elementor-widget-heading\" data-id=\"0b8827c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Materials:<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-21cdcd6 elementor-widget elementor-widget-text-editor\" data-id=\"21cdcd6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\n<ul>\n \t<li>STELLA spectrometer<\/li>\n \t<li>STELLA Dataviewer software<\/li>\n \t<li>Large screen or projector for displaying spectral signatures<\/li>\n \t<li>Various colored materials (fabric, paper, plastic, etc.)<\/li>\n\n \t<li>Leafy green plant or large healthy leaf<\/li>\n \t<li>Decaying leaf (optional)<\/li>\n \t<li>Full spectrum light (if indoors)<\/li>\n \t<li>Podium or screen to hide materials during the guessing game<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-629bc6a elementor-widget elementor-widget-heading\" data-id=\"629bc6a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Setup:<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da53920 elementor-widget elementor-widget-text-editor\" data-id=\"da53920\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol><li>Arrange the various colored materials, healthy leaf, and optionally, a decaying leaf under the full spectrum light or natural sunlight.<\/li><li>Turn on the STELLA before connecting.<\/li><li>Connect the STELLA spectrometer to a computer with the STELLA Dataviewer open.<p>**The Dataviewer only works on the Chrome browser**<\/p><\/li><li>Link to Dataviewer:\u00a0<a href=\"https:\/\/landsat.gsfc.nasa.gov\/stella-dataviewer\/index.html\">https:\/\/landsat.gsfc.nasa.gov\/stella-dataviewer\/index.html<\/a><\/li><li>Set up a large screen or projector for displaying spectral signatures.<\/li><li>Connect the computer to the large screen or projector.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17e62b8 elementor-widget-divider--view-line_text elementor-widget-divider--element-align-center elementor-widget elementor-widget-divider\" data-id=\"17e62b8\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t\t<span class=\"elementor-divider__text elementor-divider__element\">\n\t\t\t\tActivity Steps\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40b941c elementor-widget elementor-widget-text-editor\" data-id=\"40b941c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-4e85263 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4e85263\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8e7b5b1\" data-id=\"8e7b5b1\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-fa4578e elementor-widget elementor-widget-text-editor\" data-id=\"fa4578e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p><strong>Introduction (10 minutes):<\/strong><\/p><p>Briefly explain the basics of spectroscopy, emphasizing the idea that different materials have unique spectral signatures and that we obtain those spectral signatures by measuring them with an instrument called a spectrometer.<\/p><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-7ca6dbb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7ca6dbb\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9376e80\" data-id=\"9376e80\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-ce64d67 elementor-widget elementor-widget-text-editor\" data-id=\"ce64d67\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p><strong>Material Display and Recording (15 minutes):<\/strong><\/p><ul><li>Display the various colored materials, healthy leaf, and optionally, the decaying leaf.<\/li><li>Instruct students to record their observations of what they see and the colors of each material.<\/li><\/ul><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-9b2087b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9b2087b\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4aef1d4\" data-id=\"4aef1d4\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-fbb7b71 elementor-widget elementor-widget-text-editor\" data-id=\"fbb7b71\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p><strong>Guessing Game (20 minutes):<\/strong><\/p><ul><li>Hide the materials behind a podium or screen.<\/li><li>Mix up their order and reveal only the spectral signatures on the large screen using the STELLA spectrometer.<\/li><li>Encourage students to guess which spectral signature corresponds to each material based on their recorded observations.<\/li><\/ul><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-028730f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"028730f\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ae40572\" data-id=\"ae40572\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-a3d44d1 elementor-widget elementor-widget-text-editor\" data-id=\"a3d44d1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p><strong>Discussion (15 minutes):<\/strong><\/p><ul><li>Facilitate a class discussion about the guesses and the reasoning behind each choice.<\/li><li>Explain the connection between the observed colors and the corresponding spectral signatures.<\/li><li>Emphasize how spectroscopy can provide valuable information about the composition of materials.<\/li><\/ul><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-26982b2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"26982b2\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a3adfd0\" data-id=\"a3adfd0\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-6207348 elementor-widget elementor-widget-text-editor\" data-id=\"6207348\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p><strong>Advanced Thinking (20 minutes):<\/strong><\/p><ul><li>Introduce the concept of using spectroscopy for plant health assessment.<\/li><li>Display spectral signatures of the healthy leaf and the decaying leaf.<\/li><li>Discuss how the Near Infrared reflectance can indicate plant health and density.<\/li><\/ul><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-4db26f3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4db26f3\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-11c47d1\" data-id=\"11c47d1\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-46e97ae elementor-widget elementor-widget-text-editor\" data-id=\"46e97ae\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p><strong>Conclusion (10 minutes):<\/strong><\/p><ul><li>Summarize the key points learned during the activity.<\/li><li>Encourage students to reflect on the practical applications of spectroscopy, especially in fields like agriculture and environmental science.<\/li><\/ul><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-26033d5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"26033d5\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4d038b9\" data-id=\"4d038b9\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-972f71e elementor-widget elementor-widget-text-editor\" data-id=\"972f71e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p>This activity promotes hands-on engagement, critical thinking, and an understanding of the practical applications of spectroscopy, particularly in assessing plant health using the Near Infrared portion of the spectrum, one application of many from the Landsat mission.<\/p><\/div><\/div><\/div><\/div><\/div><\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c96127a elementor-widget elementor-widget-heading\" data-id=\"c96127a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Further Information, Videos and Visuals:<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b9fd1a elementor-widget elementor-widget-text-editor\" data-id=\"7b9fd1a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-4d4e2d5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4d4e2d5\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4c783cb\" data-id=\"4c783cb\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-4d072df elementor-widget elementor-widget-text-editor\" data-id=\"4d072df\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p><strong>Tour of the Electromagnetic Spectrum<\/strong><\/p><p>A pdf to learn how we use the EM spectrum in our daily lives and for science, containing visuals.<\/p><p><a href=\"https:\/\/smd-cms.nasa.gov\/wp-content\/uploads\/2023\/08\/tour-of-the-ems-tagged-v7-0.pdf\">https:\/\/smd-cms.nasa.gov\/wp-content\/uploads\/2023\/08\/tour-of-the-ems-tagged-v7-0.pdf<\/a><\/p><p>\u00a0<\/p><p><strong>Reflected Near-Infrared Waves<\/strong><\/p><p>Contains valuable information, a video and visuals about near infrared and using it to detect plant health.<\/p><p><a href=\"https:\/\/science.nasa.gov\/ems\/08_nearinfraredwaves\/\">https:\/\/science.nasa.gov\/ems\/08_nearinfraredwaves\/<\/a><\/p><p>\u00a0<\/p><p><strong>Seeing Photosynthesis from Space: NASA Scientists Use Satellites to Measure Plant Health<\/strong><\/p><p>Contains valuable information, a video and a visual about detecting plant health from space<\/p><p><a href=\"https:\/\/www.nasa.gov\/earth-and-climate\/seeing-photosynthesis-from-space-nasa-scientists-use-satellites-to-measure-plant-health\/\">https:\/\/www.nasa.gov\/earth-and-climate\/seeing-photosynthesis-from-space-nasa-scientists-use-satellites-to-measure-plant-health\/<\/a><\/p><\/div><\/div><\/div><\/div><\/div><\/section><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-067742d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"067742d\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a1eb7eb\" data-id=\"a1eb7eb\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-f5449a6 elementor-widget elementor-widget-heading\" data-id=\"f5449a6\" data-element_type=\"widget\" data-widget_type=\"heading.default\"><div class=\"elementor-widget-container\">\u00a0<\/div><\/div><\/div><\/div><\/div><\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-557a52e elementor-widget elementor-widget-heading\" data-id=\"557a52e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">More on STELLA:<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7839e00 elementor-widget elementor-widget-text-editor\" data-id=\"7839e00\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor elementor-53975 elementor-location-single post-53179 stella_activities type-stella_activities status-publish has-post-thumbnail hentry category-beginner category-stella-activities\" data-elementor-type=\"single-post\" data-elementor-id=\"53975\" data-elementor-post-type=\"elementor_library\"><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-aea4596 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"aea4596\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-cc3db63\" data-id=\"cc3db63\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-1f521d7 elementor-widget elementor-widget-theme-post-content\" data-id=\"1f521d7\" data-element_type=\"widget\" data-widget_type=\"theme-post-content.default\"><div class=\"elementor-widget-container\"><div class=\"elementor elementor-53179\" data-elementor-type=\"wp-post\" data-elementor-id=\"53179\" data-elementor-post-type=\"stella_activities\"><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-3528101 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3528101\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2287933\" data-id=\"2287933\" data-element_type=\"column\"><div class=\"elementor-widget-wrap elementor-element-populated\"><div class=\"elementor-element elementor-element-94ede7b elementor-widget elementor-widget-text-editor\" data-id=\"94ede7b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\"><div class=\"elementor-widget-container\"><p><strong>STELLA<\/strong>\u00a0(Science and Technology Education for Land\/Life Assessment) project. STELLA instruments are portable low-cost do-it-yourself (DIY) instruments that support science education, and outreach through scientific engagement, inquiry, and discovery while helping you understand Landsat better.<\/p><p><a href=\"https:\/\/landsat.gsfc.nasa.gov\/stella\/\">https:\/\/landsat.gsfc.nasa.gov\/stella\/<\/a><\/p><p><br \/>Have any good ideas, suggestions or questions? Please post them on our open-source forum:<\/p><p><a href=\"https:\/\/github.com\/STELLA-Landsat\/STELLA\/discussions\">https:\/\/github.com\/STELLA-Landsat\/STELLA\/discussions<\/a><\/p><p><br \/>More STELLA activities:<\/p><p><a href=\"https:\/\/landsat.gsfc.nasa.gov\/stella\/stella-activities\/\">https:\/\/landsat.gsfc.nasa.gov\/stella\/stella-activities\/<\/a><\/p><p><a href=\"https:\/\/github.com\/STELLA-Landsat\/STELLA\/discussions\/categories\/for-educators\">https:\/\/github.com\/STELLA-Landsat\/STELLA\/discussions\/categories\/for-educators<\/a><\/p><\/div><\/div><\/div><\/div><\/div><\/section><\/div><\/div><\/div><\/div><\/div><\/div><\/section><\/div><div class=\"elementor elementor-27717 elementor-location-footer\" data-elementor-type=\"footer\" data-elementor-id=\"27717\" data-elementor-post-type=\"elementor_library\"><section class=\"has_eae_slider elementor-section elementor-top-section elementor-element elementor-element-c11bc18 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c11bc18\" data-element_type=\"section\"><div class=\"elementor-container elementor-column-gap-default\"><div class=\"has_eae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-563f6f2\" data-id=\"563f6f2\" data-element_type=\"column\">\u00a0<\/div><\/div><\/section><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Use a STELLA instrument to assess how changing light levels during a solar eclipse affect spectral responses and temperature.<\/p>\n","protected":false},"author":2,"featured_media":1091,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"categories":[53,15,20,7,55,83,25],"tags":[69,61,71,70,62],"class_list":["post-1088","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-activity","category-applications","category-helio","category-instruments","category-intermediate","category-spectral","category-stella-1-1","tag-eclipse","tag-education","tag-heliophysics","tag-solar","tag-stem"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - 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