<p>Yes, and no. You will be able to see your hand's silhouette as it blocks incoming light from other sources, but you won't be able to see any features on it. For example, illuminance of starlight overcast moonless night sky is <a href="https://en.wikipedia.org/wiki/Lux">quoted</a> at $0.0001\ lux$ which means that in absence of a brighter light source, human eye simply isn't that sensitive to such low illuminance, even if your hand reflected all of the incoming light (it doesn't). What is the minimum lux rating that a human eye can resolve is not as straightforward to answer though, as it varies greatly by specific wavelengths. This is explained in more detail for example in this <a href="http://www.ecse.rpi.edu/~schubert/Light-Emitting-Diodes-dot-org/Sample-Chapter.pdf">Human eye sensitivity and photometric quantities (PDF)</a> document, or perhaps <a href="https://en.wikipedia.org/wiki/Scotopic_vision">Wikipedia on Scotopic vision</a>. But in a nutshell, no, you wouldn't be able to see any features on your hand in outer space, unless closer to a brighter visible wavelength light source. You'll still be able to infer that it's still there and all fingers on it accounted for, though.</p>

CC BY-SA 3.0
2014-01-20T16:55:58.607Z
And that 0.0001 lux is inside our Galaxy, with plenty of stars within just a few light-years. The light between galaxies would be much dimmer than that.
Keith Thompson
CC BY-SA 3.0
2014-01-17T18:00:23.683Z
2014-01-17T18:00:23.683Z
TildalWave
<p>If I were floating in a void (far away from any galaxy or cluster), would the light from these objects at such distances be enough to see for example, my hand?</p>

CC BY-SA 3.0
2014-01-17T18:01:19.903Z
Interesting question.
astromax
CC BY-SA 3.0
2014-05-05T20:04:08.247Z
On Earth, when it very dark at night, I don't see my own hand.
TheMaskedCucumber
<space>
Can I see "my own hand" in the void space?
JeanPaul
# Can I see "my own hand" in the void space?

(Asked by: username_0 on 2014-01-17)

If I were floating in a void (far away from any galaxy or cluster), would the light from these objects at such distances be enough to see for example, my hand?

**Tags:** space
> **Comments:**
> **username_1**: Interesting question.  
> **username_2**: On Earth, when it very dark at night, I don't see my own hand.  

---

## 1 answers

### Answer by username_3 on 2014-01-17. Score: 11 | Accepted answer

Yes, and no. You will be able to see your hand's silhouette as it blocks incoming light from other sources, but you won't be able to see any features on it. For example, illuminance of starlight overcast moonless night sky is [quoted](https://en.wikipedia.org/wiki/Lux) at $0.0001\ lux$ which means that in absence of a brighter light source, human eye simply isn't that sensitive to such low illuminance, even if your hand reflected all of the incoming light (it doesn't). What is the minimum lux rating that a human eye can resolve is not as straightforward to answer though, as it varies greatly by specific wavelengths. This is explained in more detail for example in this [Human eye sensitivity and photometric quantities (PDF)](http://www.ecse.rpi.edu/~schubert/Light-Emitting-Diodes-dot-org/Sample-Chapter.pdf) document, or perhaps [Wikipedia on Scotopic vision](https://en.wikipedia.org/wiki/Scotopic_vision). But in a nutshell, no, you wouldn't be able to see any features on your hand in outer space, unless closer to a brighter visible wavelength light source. You'll still be able to infer that it's still there and all fingers on it accounted for, though.

> **Comments:**
> **username_4**: And that 0.0001 lux is inside our Galaxy, with plenty of stars within just a few light-years. The light between galaxies would be much dimmer than that.  

---

