121–140 of 149 results
Harsh lights in residential neighborhood

Save Dark Skies

Your Home Lighting Guide

How to light your home safely, save energy, and decrease light polluion at the same time.

Bright street light at night in winter

Save Dark Skies

Bright Lights, Big Problems

In the war against light pollution astronomers have gained important new allies -- and new insights into how we see at night.

Save Dark Skies

How I Beat Light Pollution in My Hometown

You don't have to fight city hall. To ban bad lights, make city hall your friend.

1998 Pro-Am Workshop

Pro-Am Collaboration

History of Pro-Am Collaboration

Despite decades of observing in relative isolation from one another, professional and amateur astronomers began to come together in the 1980s.

Pro-Am Collaboration

Reporting and Validating a Nearby Supernova

The next time a massive star explodes in the Milky Way, it will cause a mad scramble among amateur and professional astronomers.

Diffraction Grating

Pro-Am Collaboration

The Revival of Amateur Spectroscopy

It has never been easier to explore the fascinating world of astronomical spectroscopy with backyard telescopes.

Pro-Am Collaboration

You May Already Have a Supernova Detector

Whether you scan the heavens with your eyes, a film camera, or a CCD chip, you've probably got what it takes to find the next galactic supernova.

Pro-Am Collaboration

A Field Guide to Supernova Spectra

With this kit, you're ready to identify stars that explode.

Pro-Am Collaboration

Finding the Next Nearby Supernova

Somewhere in our galaxy a time bomb is ticking down. When the next supernova blows up, will you be ready?

Two light shields

Save Dark Skies

Home Lighting Guide

Here's how to find exterior residential lighting that's dark-sky friendly.

Save Dark Skies

Jennifer Barlow: Dark-sky Devotee

One person can make a difference, as demonstrated by a high-school student's single-handed effort to help us all appreciate the night sky.

Save Dark Skies

Good Lighting Fixtures: Where to Get Them

Here's a selection of manufacturers and suppliers of good lighting equipment.

Winter constellations seen in a class 4 or 5 sky

Save Dark Skies

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.

Save Dark Skies

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.

Save Dark Skies

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 illustration.

Save Dark Skies

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.

Pro-Am Collaboration

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Pro-Am Collaboration

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…

Pro-Am Collaboration

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Pro-Am Collaboration

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