5 ms·
It's funny – at such high fidelity, the glow from all of the distant stars and galaxies make it look like light pollution.
by anamexis 6y ago
It's funny – at such high fidelity, the glow from all of the distant stars and galaxies make it look like light pollution.
- crazygringo 6y agoGood observation. I assume that's because it's "overexposed" to bring out the nebulas etc.? Zooming in all the way, the pure "black" areas between stars also seem to have a fair bit of sensor noise that probably plays a part too.
- Tuna-Fish 6y agoThere are no pure black areas between stars, and that's not (just) sensor noise. It's not very wrong to say that every single pixel in that image holds at least one galaxy. If you collect enough light, you will find something interesting to look at.
- irrational 6y agohttps://www.nationalgeographic.com/science/phenomena/2015/04/24/when-hubble-stared-at-nothing-for-100-hours/ https://www.nationalgeographic.com/science/phenomena/2015/04...
- crazygringo 6y agoAt some point the sensor noise swamps any signal, given your setup and processing. So from a philosophical view every pixel holds a galaxy, but from a practical point of view sensor noise obliterates it. I think it's reasonable to call the area in between visible stars "black" when received light is below the noise floor.
- geon 6y agoI’m guessing that it is difficult to distinguish the “noise” of sub pixel galaxies from the thermal noise of the sensor.
- vl 6y agoIt’s not exactly correct though: at this resolution - maybe, but at resolution high enough there are gaps between galaxies. The reason for that is that region of space we can observe is finite. If it would be infinite, and between any two objects we would see one more object, all we would is see is uniform white.