<p>It is possible but unlikely. Here is a really good '<em>Science 2.0</em>' article about the possibility (<a href="http://www.science20.com/robert_inventor/could_you_see_moon_city_lights_or_a_greenhouse_from_earth_just_for_fun-157480">http://www.science20.com/robert_inventor/could_you_see_moon_city_lights_or_a_greenhouse_from_earth_just_for_fun-157480</a>). Essentially, you likely wouldn't see the light on Moon settlements because there would need to have many thousands of bright lights and windows- both of these would be impractical on a moon base (windows let in radiation and are expensive, and bright lights waste valuable power). Furthermore, in order to reach a magnitude of brightness to constitute as visible, there would have to be a very large amount settlements concentrated together.</p>

CC BY-SA 3.0
2016-04-25T06:24:17.640Z
Well thought-out answer!  Maybe by the time there are cities on the moon, we won't have need for zillions of streetlights, or at least learn now to not slop a big fraction of that light into space!
uhoh
CC BY-SA 3.0
2016-04-22T15:53:45.703Z
2016-04-22T15:53:45.703Z
Sigismund
<p>This is the opposite of <a href="https://astronomy.stackexchange.com/questions/8105/can-you-see-man-made-lights-on-the-dark-side-of-the-earth-from-the-surface-of-th">another question</a>. That question is about whether you could see cities on Earth if you were standing on the Moon.</p>

<p>Let's there are cities on the Moon and you're standing on the Earth on a clear night. Could you see the city lights?</p>

<p>If you're looking at Earth cities from the Moon, your line of sight is not affected by atmospheric turbulence because the Moon is airless. But if you are on Earth, then you have to look through the turbulent atmosphere to see faint lights. <a href="https://en.wikipedia.org/wiki/Astronomical_seeing" rel="nofollow noreferrer">So you won't have to put up with the turbulence that makes stars look blurry or twinkley from the Earth</a>.</p>

<p>But if you're on the Earth, any city lights on the Moon might look blurry or twinkley from our atmospheric turbulence. If it helps, imagine yourself at the top of a mountain so there is less atmosphere to look through and hence less turbulence.</p>

<p>In this picture of the Moon (and Venus in the background), imagine cities on dark part of the Moon's surface facing Earth. Those city lights should be easier to see than cities within the lit crescent.</p>

<p><a href="https://i.sstatic.net/9pNNX.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/9pNNX.jpg" alt="enter image description here"></a></p>

CC BY-SA 3.0
2016-04-22T14:14:37.343Z
I don't see why the answer would be any different. The blurring by your eye's limited resolution is far more important than anything induced in the atmosphere.
ProfRob
<the-moon><amateur-observing><atmospheric-effects>
Can you see city lights on the Moon from Earth?
RichS
# Can you see city lights on the Moon from Earth?

(Asked by: username_0 on 2016-04-22)

This is the opposite of [another question](https://astronomy.stackexchange.com/questions/8105/can-you-see-man-made-lights-on-the-dark-side-of-the-earth-from-the-surface-of-th). That question is about whether you could see cities on Earth if you were standing on the Moon.

Let's there are cities on the Moon and you're standing on the Earth on a clear night. Could you see the city lights?

If you're looking at Earth cities from the Moon, your line of sight is not affected by atmospheric turbulence because the Moon is airless. But if you are on Earth, then you have to look through the turbulent atmosphere to see faint lights. [So you won't have to put up with the turbulence that makes stars look blurry or twinkley from the Earth](https://en.wikipedia.org/wiki/Astronomical_seeing).

But if you're on the Earth, any city lights on the Moon might look blurry or twinkley from our atmospheric turbulence. If it helps, imagine yourself at the top of a mountain so there is less atmosphere to look through and hence less turbulence.

In this picture of the Moon (and Venus in the background), imagine cities on dark part of the Moon's surface facing Earth. Those city lights should be easier to see than cities within the lit crescent.

[![enter image description here](https://i.sstatic.net/9pNNX.jpg)](https://i.sstatic.net/9pNNX.jpg)

**Tags:** the-moon, amateur-observing, atmospheric-effects
> **Comments:**
> **username_1**: I don't see why the answer would be any different. The blurring by your eye's limited resolution is far more important than anything induced in the atmosphere.  

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## 1 answers

### Answer by username_2 on 2016-04-22. Score: 8 | Accepted answer

It is possible but unlikely. Here is a really good '*Science 2.0*' article about the possibility (<http://www.science20.com/robert_inventor/could_you_see_moon_city_lights_or_a_greenhouse_from_earth_just_for_fun-157480>). Essentially, you likely wouldn't see the light on Moon settlements because there would need to have many thousands of bright lights and windows- both of these would be impractical on a moon base (windows let in radiation and are expensive, and bright lights waste valuable power). Furthermore, in order to reach a magnitude of brightness to constitute as visible, there would have to be a very large amount settlements concentrated together.

> **Comments:**
> **username_3**: Well thought-out answer!  Maybe by the time there are cities on the moon, we won't have need for zillions of streetlights, or at least learn now to not slop a big fraction of that light into space!  

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