SUNSET: 
Home Lighting Guide
Here's how to find exterior residential lighting that's dark-sky friendly.
Good Lighting Fixtures: Where to Get Them
Here's a selection of manufacturers and suppliers of good lighting equipment.
Gauging Light Pollution: The Bortle Dark-Sky Scale
Excellent? Typical? Urban? Use this nine-step scale to rate the sky conditions at any observing site.
Join the Fight Against Light Pollution
Only a tiny fraction of amateur astronomers do anything to help reduce bad outdoor lighting. We need to change that.
Everything You Ever Wanted to Know About Light Pollution
Knowledge is power: here are the facts you need to help you combat light pollution in your neighborhood.
Light Pollution In The Night Sky
Light pollution has become so pervasive that it compromises the view of the universe for an estimated 90 percent of Americans.
Oops! No Data!
It seems you submitted the Nearby-Supernova AstroAlert Report Form without filling in any of the data fields. Please click your browser's "Back" button, or follow the link below, and try again. Thanks for your interest in Sky & Telescope's AstroAlert!
Thank You!
Thank you for submitting your observing report to Sky & Telescope's AstroAlert service. If we have any questions about your data, we'll contact you by e-mail. Please note that at present we are interested only in reports following up a nearby-supernova alert. Observations in response to other types of alerts…
Oops! Missing or Invalid E-mail Address(es)
It seems that you forgot to supply your old e-mail address, your new one, or both. Please click the "Back" button on your browser, or click the "Change E-mail Address" link below, and try again. Thank you! AstroAlert Main Page | Change E-mail Address
Oops! No Lists Selected
It seems you forgot to check any boxes on the AstroAlert change-of-address form. Please click the "Back" button on your browser, or click the "Change E-mail Address" link below, and try again. Thank you! AstroAlert Main Page | Change E-mail Address
Oops! Missing or Invalid E-mail Address
It seems that you forgot to supply an e-mail address or that the address you supplied is invalid. Please click the "Back" button on your browser, or click the "Subscribe" link below, and try again. Thank you! Subscribe
Thanks for Checking!
Please remember to check your e-mail for a reply from our Majordomo listserv software. It will show you the AstroAlert lists to which you currently subscribe. AstroAlert Main Page | Subscribe | Unsubscribe
Oops! Missing or Invalid E-mail Address
It seems that you forgot to supply an e-mail address or that the address you supplied is invalid. Please click the "Back" button on your browser, or click the "Unsubscribe from AstroAlert" link below, and try again. Thank you! AstroAlert Main Page | Unsubscribe from AstroAlert
Oops! Missing or Invalid E-mail Address
It seems that you forgot to supply an e-mail address or that the address you supplied is invalid. Please click the "Back" button on your browser, or click the "Subscribe to AstroAlert" link below, and try again. Thank you! AstroAlert Main Page | Subscribe to AstroAlert
Oops! No Lists Selected
It seems you forgot to check any boxes on the AstroAlert subscribe form. Please click the "Back" button on your browser, or click the "Subscribe to AstroAlert" link below, and try again. Thank you! Subscribe to AstroAlert
Oops! No Lists Selected
It seems you forgot to check any boxes on the AstroAlert unsubscribe form. Please click the "Back" button on your browser, or click the "Unsubscribe from AstroAlert" link below, and try again. Thank you! Unsubscribe from AstroAlert
Results of Nearby-Supernova AstroAlert Test
Our February 2003 AstroAlert test went very well. Here we report on what we learned, thanks to the enthusiasm and dedication of the test's participants.
TEST - Possible Galactic Supernova!
In February 2003, Sky & Telescope and the SuperNova Early Warning System (SNEWS) conducted a test of the AstroAlert system. Here's what it looked like.