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A brief discussion of the moon and the scientists who attempted to map it.

The Moon in Sidereus Nuncius
Ignoring the occasional pre-telescopic appearance of exceptionally large sunspots , the Moon is the only heavenly body which shows features to the nakedeye--the Man in the Moon. These features are permanent, and it was therefore obvious that the Moon always keeps its same faceturned to us (although there are minor perturbations that were not noticed until later). In the philosophy of Aristotle(384-322 BCE), these features presented somewhat of a problem. The heavens, starting at the Moon, were the realm ofperfection, the sublunary region was the realm of change and corruption, and any resemblance between these regions wasstrictly ruled out. Aristotle himself suggested that the Moon partook perhaps of some contamination from the realm ofcorruption.

Although Aristotle's natural philosophy was very influential in the Greek world, it was not without competitors andskeptics. Thus, in his little book On the Face in the Moon's Orb , the Greek writer Plutarch (46-120 CE) expressed rather different views on the relationship between theMoon and Earth. He suggested that the Moon had deep recesses in which the light of the Sun did not reach and that the spots arenothing but the shadows of rivers or deep chasms. He also entertained the possibility that the Moon was inhabited. In thefollowing century, the Greek satirist Lucian (120-180 CE) wrote of an imaginary trip to the Moon, which was inhabited, as werethe Sun and Venus.

The medieval followers of Aristotle, first in the Islamic world and then in Christian Europe, tried to make sense of the lunarspots in Aristotelian terms. Various possibilities were entertained. It had been suggested already in Antiquity that theMoon was a perfect mirror and that its markings were reflections of earthly features, but this explanation was easily dismissedbecause the face of the Moon never changes as it moves about the Earth. Perhaps there were vapors between the Sun and the Moon,so that the images were actually contained in the Sun's incident light and thus reflected to the Earth. The explanation thatfinally became standard was that there were variations of "density" in the Moon that caused this otherwise perfectlyspherical body to appear the way it does. The perfection of the Moon, and therefore the heavens, was thus preserved.

It is a curious fact that although many symbolic images of the Moon survive in medieval and Renaissance works of art (usually acrescent), virtually no one bothered to represent the Moon with its spots the way it actually appeared. We only have a few roughsketches in the notebooks of Leonardo da Vinci (ca. 1500) and a drawing of the naked-eye moon by the English physician William Gilbert . None of these drawings found its way into print until well after the telescope had come into astronomy.

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Galileo project. OpenStax CNX. Jul 07, 2004 Download for free at http://cnx.org/content/col10234/1.1
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