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Shedding Light on Light Pollution: Its Impact on Astronomy

I grew up just outside of Detroit, so when we moved to Texas when I was in high school I was amazed by the amount of stars I saw in the sky. I didn't know what light pollution was at the time, but looking back I know it's the reason I didn't see as many stars in the sky growing up.

What is Light Pollution?

In simple terms, light pollution is the brightening of the night sky caused by street lights, buildings, and other sources of artificial light. This excess light scatters into the atmosphere, creating a glow that overpowers the light from stars and other celestial objects.

The Vanishing Stars

The most obvious impact of light pollution is on our ability to see stars. In many urban areas, only a handful of the brightest stars and planets are visible. This not only hampers our appreciation of the night sky but also affects amateur and professional astronomers who rely on a clear view of the heavens for their observations and studies.

Effects on Astronomical Research

For astronomers, light pollution is a major headache. It interferes with the observations of faint objects and phenomena. This is why many observatories are located in remote areas, where the effects of light pollution are minimized. However, as urban areas expand, finding dark skies is becoming increasingly difficult.

The Disruption of Nocturnal Wildlife

It's not just about stargazing. Light pollution can disrupt the natural behavior of nocturnal animals and insects. For example, sea turtles can become disoriented by beachfront lighting, and many species of birds are affected by brightly lit buildings and towers.

Fighting Back Against Light Pollution

So, what can we do? A lot actually! Using properly shielded lights, reducing unnecessary outdoor lighting, and advocating for "dark sky" initiatives in our communities can make a big difference. Organizations like the International Dark-Sky Association work to promote these ideas and provide guidelines for minimizing light pollution.


While light pollution is a growing problem, awareness and action can help mitigate its effects. By making small changes in our lighting choices and advocating for dark sky policies, we can preserve our view of the cosmos and protect nocturnal environments.

If you want to learn more, check out this video I did about light pollution.

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