https://darkskymass.org/2026/03/14/get-ready-for-dark-sky-week/2026-03-25T14:28:48+00:00monthlyhttps://darkskymass.org/best-practices/massachusetts-towns-with-outdoor-lighting-ordinances/2026-01-23T21:41:19+00:00weekly0.6https://darkskymass.org/donate/2025-12-17T20:19:56+00:00weekly0.6https://darkskymass.org/2025/11/29/dark-sky-bill-advances-in-legislature/2025-11-29T17:31:15+00:00monthlyhttps://darkskymass.org/2025/03/05/dark-sky-bills-filed-again/2025-11-29T17:12:42+00:00monthlyhttps://darkskymass.org/2025/11/20/wgbhs-bpr-spotlights-darksky-mass/2025-11-22T16:07:08+00:00monthlyhttps://darkskymass.org/2025/10/10/join-darksky-massachusetts-annual-meeting-on-november-1/https://darkskymass.org/wp-content/uploads/2025/10/maynard-fire-house-cropped.jpgFire house in Maynard, MAFire house in Maynard, MA2025-10-28T23:12:10+00:00monthlyhttps://darkskymass.org/connect-with-us/2025-08-14T18:51:34+00:00weekly0.6https://darkskymass.org/events/calendar/2025-08-14T18:49:50+00:00weekly0.6https://darkskymass.org/about-us/massachusetts-chapter/2025-08-12T19:50:43+00:00weekly0.6https://darkskymass.org/about-us/partnerships-committee/2025-08-12T19:41:51+00:00weekly0.6https://darkskymass.org/about-us/public-awareness-committee/2025-08-12T19:41:17+00:00weekly0.6https://darkskymass.org/about-us/policy-committee/2025-08-12T19:40:04+00:00weekly0.6https://darkskymass.org/about-us/2025-08-12T19:38:23+00:00weekly0.6https://darkskymass.org/contact-us/2025-08-12T01:17:45+00:00weekly0.6https://darkskymass.org/darksky-international/2025-08-11T23:09:37+00:00weekly0.6https://darkskymass.org/about-us/dark-sky-places-committee/2025-08-11T23:02:19+00:00weekly0.6https://darkskymass.org/about-us/executive-committee/2025-08-11T22:52:33+00:00weekly0.6https://darkskymass.org/2025/04/23/celebrate-dark-sky-week/2025-07-10T16:50:33+00:00monthlyhttps://darkskymass.org/2024/04/05/governor-healey-proclaims-april-2-8-dark-sky-week-in-massachusetts/2025-03-05T19:58:24+00:00monthlyhttps://darkskymass.org/resources/checklist-for-dark-sky-compliant-municipal-lighting/2024-12-04T21:17:10+00:00weekly0.6https://darkskymass.org/best-practices/2024-11-16T23:09:10+00:00weekly0.6https://darkskymass.org/resources/2024-11-16T22:53:19+00:00weekly0.6https://darkskymass.org/2024/10/01/save-the-date-annual-meeting-is-nov-2nd/https://darkskymass.org/wp-content/uploads/2024/10/watitoh3.jpegWatitoh32024-11-16T22:21:41+00:00monthlyhttps://darkskymass.org/led-conversions-in-massachusetts/https://darkskymass.org/wp-content/uploads/2018/08/municipal-led-ownership.pngMunicipal-LED-OwnershipMAPC's map of LED street conversions as of November 20172024-05-31T19:02:07+00:00weekly0.6https://darkskymass.org/best-practices/contemporary-outdoor-lighting-bylaw/2024-05-31T18:31:53+00:00weekly0.6https://darkskymass.org/resources/darkness-in-distress/https://darkskymass.org/wp-content/uploads/2018/03/graphic-of-lighting-zones.jpgGraphic of lighting zonesThis shows a sample of the graphics used in "Darkness in Distress."https://darkskymass.org/wp-content/uploads/2018/03/darkness-in-distress-title-slide.jpgDarkness in Distress title slide2024-03-28T01:36:50+00:00weekly0.6https://darkskymass.org/2023/12/20/highlights-of-2023s-annual-meeting/https://darkskymass.org/wp-content/uploads/2024/01/2023-meeting-wideview-m.jpg2023-meeting-wideview-mDarkSkyMA's annual meeting on December 9th. Photo by James Lowenthal.https://darkskymass.org/wp-content/uploads/2024/01/chelmsford-lighting-demo-m.jpgchelmsford-lighting-demo-mhttps://darkskymass.org/wp-content/uploads/2024/01/sportslighting-demo-m.jpgsportslighting-demo-mMusco Lighting’s Mike Limpach (at left) demonstrates how poorly shielded sports lighting can create intense glare away from the field of play. (James Lowenthal photo)https://darkskymass.org/wp-content/uploads/2024/01/2023-ds-ma-speakers.jpg2023-ds-ma-speakers2024-01-04T15:14:59+00:00monthlyhttps://darkskymass.org/resources/the-city-dark/https://darkskymass.org/wp-content/uploads/2018/08/city-dark-pbs-still.jpgCity Dark PBS still2023-09-26T18:23:06+00:00weekly0.6https://darkskymass.org/2023/09/12/new-model-lighting-bylaw-for-ma/2023-09-13T01:55:24+00:00monthlyhttps://darkskymass.org/learn/brightness/https://darkskymass.org/wp-content/uploads/2023/09/light-pollution-solutions-from-mont-magetic-qc.pnglight-pollution-solutions-from-mont-magetic-qchttps://darkskymass.org/wp-content/uploads/2023/09/screenshot-2023-09-07-at-7.19.37-pm.pngscreenshot-2023-09-07-at-7.19.37-pm2023-09-12T14:09:58+00:00weekly0.6https://darkskymass.org/about-us/regional-planning-agencies-in-ma/2023-05-12T14:45:40+00:00weekly0.6https://darkskymass.org/about-us/international-dark-skies/2023-05-12T14:44:00+00:00weekly0.6https://darkskymass.org/guest-talks-at-our-annual-meetings/2023-05-12T14:22:12+00:00weekly0.6https://darkskymass.org/learn/https://darkskymass.org/wp-content/uploads/2018/02/kelvin-color-temp-chart.pngKelvin color temp charthttps://darkskymass.org/wp-content/uploads/2018/02/light_pollution_diagram_680px.jpgSemini_lightPollutionFinal2023-05-12T14:09:33+00:00weekly0.6https://darkskymass.org/events/ongoing/2023-05-12T13:54:14+00:00weekly0.6https://darkskymass.org/events/2023-05-12T13:51:14+00:00weekly0.6https://darkskymass.org/resources/fundamentals-of-outdoor-lighting-regulation/2023-05-12T13:24:54+00:00weekly0.6https://darkskymass.org/2023/03/01/ask-gov-healey-to-promote-international-dark-sky-week/2023-03-21T22:20:10+00:00monthlyhttps://darkskymass.org/2023/03/21/ma-legislation-is-back/https://darkskymass.org/wp-content/uploads/2023/03/h3164-title-page.jpgh3164-title-pagehttps://darkskymass.org/wp-content/uploads/2023/02/sd1219.pngsd12192023-03-21T22:19:31+00:00monthlyhttps://darkskymass.org/2023/02/15/check-out-ida-mas-lighting-checklist/2024-09-21T20:27:26+00:00monthlyhttps://darkskymass.org/2021/06/29/introducing-nantucket-lights/2023-02-14T20:30:33+00:00monthlyhttps://darkskymass.org/2021/10/01/dark-sky-bills-in-the-spotlight/2023-02-14T20:30:19+00:00monthlyhttps://darkskymass.org/2021/11/10/annual-meeting-on-saturday-nov-6th/https://darkskymass.org/wp-content/uploads/2022/07/image.pngimage2023-02-14T20:29:39+00:00monthlyhttps://darkskymass.org/2022/11/25/annual-meeting-saturday-nov-19th/https://darkskymass.org/wp-content/uploads/2022/11/macleish-field-station.jpgmacleish-field-station2023-02-14T20:29:22+00:00monthlyhttps://darkskymass.org/2021/04/26/sign-the-petition-for-our-dark-sky-bills/2022-04-14T19:36:15+00:00monthlyhttps://darkskymass.org/2021/04/14/state-bills-have-new-designations/2021-04-15T14:36:06+00:00monthlyhttps://darkskymass.org/learn/ama-report-on-outdoor-light-at-night/2021-03-18T21:28:00+00:00weekly0.6https://darkskymass.org/learn/light-pollution-diagram/2021-03-18T21:23:02+00:00weekly0.6https://darkskymass.org/2021/02/07/ida-mas-2020-annual-report/2021-02-23T22:16:12+00:00monthlyhttps://darkskymass.org/2021/02/11/dark-sky-bill-refiled-action-needed/2021-02-12T02:12:08+00:00monthlyhttps://darkskymass.org/2021/01/05/statewide-bill-dies-in-committee/2021-02-12T02:07:30+00:00monthlyhttps://darkskymass.org/2020/10/27/doug-arion-gets-ida-dark-sky-defender-award/2020-10-27T14:40:53+00:00monthlyhttps://darkskymass.org/2020/10/27/get-ready-for-idas-global-conference/2020-10-27T14:39:48+00:00monthlyhttps://darkskymass.org/2020/10/05/great-crowd-at-ida-mas-annual-meeting/2020-10-27T13:57:06+00:00monthlyhttps://darkskymass.org/2020/09/02/save-the-date-october-4th-for-ida-mas-annual-meeting/2020-10-02T16:09:25+00:00monthlyhttps://darkskymass.org/2020/02/18/show-your-love-for-the-stars/https://darkskymass.org/wp-content/uploads/2020/02/love-the-stars.jpgLove the starsNational Optical-Infrared Astronomy Research Laboratory / AURA / P. Marenfeld2020-03-02T14:28:05+00:00monthlyhttps://darkskymass.org/2020/02/05/dark-sky-bills-advance-in-legislature/2020-02-05T23:52:36+00:00monthlyhttps://darkskymass.org/2020/01/31/ida-mas-2019-annual-report/2020-02-05T23:51:46+00:00monthlyhttps://darkskymass.org/2019/09/15/ida-ma-2019-draws-impressive-speakers/https://darkskymass.org/wp-content/uploads/2020/01/hartley-address-ida-ma-2019.jpgRuskin Hartley addresses IDA-MA 2019Ruskin Hartley addresses IDA-MA 20192020-01-08T21:15:47+00:00monthlyhttps://darkskymass.org/2019/08/31/come-to-ida-mas-annual-meeting-on-saturday-sept-7th/https://darkskymass.org/wp-content/uploads/2019/08/10-city-square1-1024x682.jpgAMC's headquarters in BostonThe AMC's offices are at 10 City Square in Charlestown, about ¼ mile from the <i>U.S.S. Constitution</i>.2019-08-31T15:35:04+00:00monthlyhttps://darkskymass.org/2019/06/01/dark-sky-bill-gets-public-hearing/https://darkskymass.org/wp-content/uploads/2019/06/leds-in-a-box-m.jpgLEDs in a boxDuring the hearing, Kelly Beatty got a chance to demonstrate the difference between an LED with a correlated color temperature of 2700K (on the left) and one with a distinctly bluer CCT of 4000K.<br /><i>Courtesy Kelly Beatty</i>https://darkskymass.org/wp-content/uploads/2019/06/committee-testimony-30may1019-full.jpgJoint Committee testimony on May 30, 2019On May 30th, members of IDA-MA testified for the proposed "dark-sky bill" during a public hearing of the Joint Committee on Telecommunications, Utilities, and Energy.<br /><i>Catherine Anderson</i>2019-06-08T14:15:23+00:00monthlyhttps://darkskymass.org/2019/04/01/great-media-coverage-of-the-dark-sky-bill/2019-04-16T16:52:15+00:00monthlyhttps://darkskymass.org/2019/04/01/celebrate-international-dark-sky-week/2019-04-01T20:29:51+00:00monthlyhttps://darkskymass.org/2019/02/04/support-dark-sky-legislation-in-massachusetts/2021-01-19T05:56:26+00:00monthlyhttps://darkskymass.org/2018/08/26/inaugural-meeting-of-ida-massachusetts/https://darkskymass.org/wp-content/uploads/2018/08/ida-ma-attendees-m.jpgIDA MA meeting attendeesAttendees at the IDA MA gathering on August 25, 2018/<br /><i>Photo by Kelly Beatty</i>2018-08-26T16:31:28+00:00monthlyhttps://darkskymass.org/resources/losing-the-dark/https://darkskymass.org/wp-content/uploads/2018/08/losing-the-dark-still.jpgLosing the Dark still2018-08-05T21:39:04+00:00weekly0.6https://darkskymass.org/learn/light-pollution-in-massachusetts-the-view-from-space/https://darkskymass.org/wp-content/uploads/2018/08/massachusetts-light-pollution-bigmap.jpg2016 map of light pollutionThis map, recorded by an orbiting satellite in 2016, shows how pervasive light pollution has become throughout Massachusetts. Click on the map to show a larger, more detailed version.https://darkskymass.org/wp-content/uploads/2018/08/massachusetts-light-pollution-smallmap.jpg2016 map of light pollutionThis map, recorded by an orbiting satellite in 2016, shows how pervasive light pollution has become throughout Massachusetts. Click on the map to show a larger, more detailed version.2018-08-05T20:28:02+00:00weekly0.6https://darkskymass.org/learn/color-temperature/2018-08-05T20:26:14+00:00weekly0.6https://darkskymass.org/resources/tedx-springfield-video/2018-08-05T18:47:26+00:00weekly0.6https://darkskymass.org/2018/07/30/aug-10-19-summer-star-party-in-western-ma/2018-08-02T01:00:40+00:00monthlyhttps://darkskymass.org/2018/02/10/april-15-21-2018/2018-03-07T15:00:36+00:00monthlyhttps://darkskymass.org/2018/02/09/the-journey-begins/2018-03-07T14:57:50+00:00monthlyhttps://darkskymass.orgdaily1.02026-03-25T14:28:48+00:00