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A camera or a telescope (:
That is true, all the constellations are composed of stars which are part of the Milky Way. Other galaxies are seen by the unaided human eye as cloud-like nebulae, rather than point sources of light.
"microscopic" Naked = The average human eye, without the use of any artificial aids like, glasses, microscope, telescope etc.
Short answer: Zacharias Jansen Long answer: Your question is not valid for 2 reasons: 1. You cannot "discover" something if it does not exist. You should be asking who invented it, not who found it laying around somewhere. 2. A "simple microscope" is not common terminology. Simple compared to an electron microscope? or simple compared to a compound microscope? What is typically referred to as just "microscope" is technically a compound microscope. A set of multiple lenses mounted in a desktop style that allows the compounding of magnification. A compound microscope is the standard microscope in any basic lab setting. Anything more "simple" than a compound microscope would not even really be a microscope, it would either be a telescope, or simpler than that is a magnifying glass (with a single lens) The inventor of the magnifying glass was: Roger Bacon The next step up is the telescope invented by: Zacharias Jansen The next step up is the "compound microscope" which was also invented by: Zacharias Jansen (this is the simplest form of what would be recognized as or named "microscope") If you wanted to go even "simpler" and define microscope as anything that magnifies, there were reading glasses around for thousands of years prior, and even "reading stones" which were lumps of polished glass used to magnify parchment in Egypt as far back as 7000 B.C. (inventor unknown). So it really depends on how you wish to refine your meaning of simple. The magnification of anything? There is no known inventor for reading stones, his name is lost to time. Or if you mean the first invented microscope that could examine things too small for a human eye to detect, that's a compound microscope. Thus if I am guessing your meaning correctly, you meant to ask this question: Question: Who invented the compound microscope? Answer: Zacharias Jansen
We can hardly differentiate the four lines drawn within a one-milimeter-length (250 micrometer). Below this line lies the realm which is invisible to human unaided eye: 200-250 micrometer The resolution of the light microscope cannot be smaller than the half of the wavelength of the visible light, which is 0.4-0.7 micrometer. When we use green light (0.4 micron), we can see the objects which is, at most, about 0.2 micron (200 nanometer). Below this point, light microscope is useless, because we must use a wavelength smaller than 400 micrometer. The waves that associate the electrons has smaller wavelength. Then we can use electrons, but in an electron microscope. ahmetcorak
Micro-orgasims are very small particles that you can see under a microscope.
As far as an UNAIDED human, no it is not possible. By unaided - nothing other than their writing utensil, hand and the surface being drawn on with no guide, tools, marks or the like.
By definition, a microorganism cannot be seen by the unaided human eye.
how did the microscope change the human understanding of life
No. Its brightness is below the limit of sensitivity for the unaided human eye.
Pass a thread through the eye of a needle unaided from the opposite side of the needle towards the human eye; while looking through the eye of the needle.
Any organism which is too small to be seen with the unaided human eye is by definition a microorganism.
Infrared waves are a frequency of the spectrum that is undetectable by the unaided human eye.