DarkSky Massachusetts

Massachusetts chapter of DarkSky International, formerly International Dark Sky Association, espousing the five principles of responsible lighting.

[DarkSky Massachusetts @IDA_Mass]

In most of western Europe, light pollution is getting better. Those countries are making an effort. https://t.co/byOZq7FgUR #protectthenight @IDADarkSky

[DarkSky Massachusetts @IDA_Mass]

The U.K.’s Royal Astronomical Society is urging governments to formally recognize artificial light at night as a pollutant. @IDADarkSky
https://t.co/SojozrO4Su #protectthenight

[DarkSky Massachusetts @IDA_Mass]

Congratulations to our own Kelly Beatty and the Chelmsford Town Planning Board on approval of their new outdoor lighting bylaw! https://t.co/zKFlBuxJQx @IDADarksky #protectthenight

[DarkSky Massachusetts @IDA_Mass]

How to talk to your neighbors about their unpleasant outdoor lighting https://t.co/6cF5HOK8y7 @IDADarksky

[DarkSky Massachusetts @IDA_Mass]

Dramatic illustration (10-minute exposure) of the effect of satellite trails on the night sky https://t.co/hWQF52Pxa1 @IDADarksky #protectthenight

[DarkSky Massachusetts @IDA_Mass]

https://t.co/2pu5lPOd5b

[DarkSky Massachusetts @IDA_Mass]

Nice article about protecting dark skies on Cape Cod @IDADarksky

[DarkSky Massachusetts @IDA_Mass]

We have posted more information on supporting Massachusetts dark sky legislation here. Thanks in advance for the help. #protectthenight https://t.co/53hfxPfxEp

[DarkSky Massachusetts @IDA_Mass]

Call to action to support Mass. "dark sky" legislation, S.2243 and H.3494. Please write key legislators. Info here:
https://t.co/h5LvsLDb9p #protectthenight

[DarkSky Massachusetts @IDA_Mass]

Write to key legislators: Chair, Senate Committee on Ways and Means, [email protected] • Senate President [email protected] • Chair, House Committee on Ways and Means [email protected] • Speaker of the House o [email protected]

[DarkSky Massachusetts @IDA_Mass]

Massachusetts wastes millions of dollars annually on overly bright public lighting that lights up not only our streets but also the sky. Please support legislation, S.2243 and H.3494, to address this problem. Info: https://t.co/oUQ00YlRgC https://t.co/5Olc4l0Qpr
#protectthenight

[DarkSky Massachusetts @IDA_Mass]

Events in Massachusetts for International Dark Sky Week and Massachusetts Space Week 2026 @IDADarksky https://t.co/aV5RapdHIT https://t.co/1jqdf40qSV

[DarkSky Massachusetts @IDA_Mass]

This white paper from @IDADarksky provides quantitative arguments for shielding outdoor light fixtures to at least 10 degrees below horizontal. "... light emitted between 80° and 90° above nadir provides limited visual benefit ..."
https://t.co/ExfwZG8NYr

[DarkSky Massachusetts @IDA_Mass]

Sierra Club Massachusetts's Cape Cod Group Meeting: Third Tuesday Talk: Saving the Night: Reducing Light Pollution on the Cape & Islands. Tuesday, February 17th, :00 - 8:00pm ET.
Virtual, via Zoom. Info and Zoom link here: https://t.co/38rR3Y3epl
@IDADarksky

[DarkSky Massachusetts @IDA_Mass]

https://t.co/YeXO6sqim2 @IDADarksky "... Compared with most outdoor lighting, headlights combine high intensity, horizontal projection, wide spatial reach, blue-rich light spectra, and intermittent bursts of extreme brightness."

[DarkSky Massachusetts @IDA_Mass]

https://t.co/LEox0Vx1Jc
Suggestions for improving the design of car headlights: "Adaptive lighting, improved beam control, and limits on unnecessary brightness can improve safety while reducing light pollution." @IDADarksky @@RepMGP

[DarkSky Massachusetts @IDA_Mass]

Night sky with satellite constellation https://t.co/JYqtRKvOR3 @IDADarksky

[DarkSky Massachusetts @IDA_Mass]

https://t.co/fhJ0LiUmVs @IDADarksky

[DarkSky Massachusetts @IDA_Mass]

https://t.co/E77h7Zzf8f @IDADarksky

[DarkSky Massachusetts @IDA_Mass]

DarkSky International’s organizational statement on Reflect Orbital: https://t.co/rUMLZMFoJ3
@IDADarksky