-1
$\begingroup$

How did the humans take photos for the galaxies, black holes, stars, nebulas etc in the outer space?!

I guess they went out of the Earth planet and nearly out of the Milky Way galaxy by space-ships or probes and that is how they took photos for the stars, nebulas, blackholes, and galaxies in the outer space

If my guess is wrong then how did they do it?!

$\endgroup$
  • $\begingroup$ Do you have any idea how far away you're proposing? $\endgroup$ – Carl Witthoft Sep 13 '17 at 15:16
  • 2
    $\begingroup$ Clearly, OP doesn't have as much understanding of the distances involved as you or I. It's much better to increase a person's knowledge, than to belittle them for a lack of it. $\endgroup$ – Jim421616 Sep 14 '17 at 20:46
8
$\begingroup$

The same way I can take photos of my neighbourhood without leaving my house; light travels from the surrounding houses, through my windows, and I capture that light in a photograph. No need to leave my house.

The stars you can see at night would be like the houses in my street. The Milky Way Galaxy would be like the sky-glow I can see coming from the middle of the city I live in. I can see all of those things without leaving my house. On a dark night, I can even see sky-glow from the next town over, which is a bit like seeing a distant galaxy.

In the same way, we don't need to leave Earth to get photos of things in outer space; light travels from those objects, through the Earth's atmosphere (which is like the windows in my house), and we capture that light in photographs.

At the moment (and for the near future), we don't have any spaceships which can travel outside the Galaxy -- which would take millions of years at the speed of our fastest ships yet -- and our first interplanetary spacecraft (the Voyager probes, launched in the 1970's (before I was born), have only just left the Solar System. It would take them tens of thousands of years even to reach the nearest star (but they're not even aimed in that direction).

$\endgroup$
  • $\begingroup$ I guess this satisfied the OP's curiosity because it is the accepted answer but it doesn't really explain how. I'm not even close to an expert which is why I am not posting an answer but the real answer is MATH. Many, if not most photographs are simply computer generated images based on various combinations of readings and any "colorization/prettyfying" of the images is merely computer generated. Thanks to mathematics the data can be rotated to generate images from pretty much any perspective you want. Even "light" photographs require math to ensure long exposure times for taking images. $\endgroup$ – Dunk Oct 5 '17 at 19:05

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.