How many stars are visible to the unaided eye from the surface of the earth?

Question

How would I research this question?! Where did you get your information from?!

I don't want the answer!! I want to know how you would get the answer!!!

Answer 1

Wow...You have asked a loaded question.

First: Visibility depends upon the quality of the actual viewer's eyesight. If you have good eyesight you will see
a larger quantity of stars than someone with eyesight that is poorer.

Second: Almost all of the stars that are visable with the naked eye on a clear night are within the Milky Way Galaxy.
The exact number of stars within the Milky Way Galaxy is unknown. However, estimates have placed the number at over 200 Billion stars.

Third: The Earth is a sphere. The observer would be standing upon the Earth, and so the Earth would block his/her view of all things below their visable horizon. Add into that visual problem the possibliity of mountains or tall buildings blocking several degrees of view (lifting the horizon in some places), and the problem becomes loaded with uncertainties.

Fourth: Stars at varyious distances from the Earth have various brightnesses. Further, some stars are bigger and therefore brighter than others. To complicate this somewhat, some stars are Doublets and Triplets (two or three stars circling each other in close proximity) and are much brighter than normal single stars. So there is a whole range of star brightness values. In star charts we see this quantity listed as Magnitude "XYZ".

In short, this is a very difficult question to answer with any degree of certainty. It is certainly open to argument based if nothing else upon the location of the observer:

BEST COUNT: Observer is standing upon the peak of a
very high mountain top on a clear dark night with no illumination from the moon.

WORST COUNT: Observer is standing in a City Park on a clear dark night with a bright, full Moon. City lights illuminate the surrounding sky and block observation of many stars. The Moon's brightness blocks observation of many, many stars as it moves across the sky.

ESTIMATE OF VISABLE STARS FROM UNKNOWN SITE:

= 30,000,000,000.

Regards,

Zah

Answer 2

the respond to this question is that it concerns the place you're placed as one ingredient. yet as a common rule, no count how sparkling the night skies may well be, the unaided human eye can basically see stars all the way down to appropriate to the 6th magnitude. The brightest stars are termed as 1st magnitude...and the greater advantageous the extensive sort, the dimmer the famous person...and 6th magnitude stars is the perfect that the unaided eye can see. It additionally demands that your eyes are "dark-adapted". once you pass exterior, all supplies of light ought to be eradicated and shelter your self against finding at any gentle source. After being at night for roughly 20 minutes time, your eyes could have become "dark-adapted", and that is then which you are going to locate the celebrities to the perfect of your ability...approximately magazine 6. that is estimated that approximately 6,000 "time-honored" stars (with the aid of a designation) could be considered with the unaided eye after dark-adaption...yet with the aid of that I mean of the two hemispheres.

Answer 3

I depends on what you mean by "visible". There are billions of stars that are apparent in the Milky Way and other nearby galaxies, but these are not distinguishable as individual stars. The number of distinguishable naked eye stars is around 5000 under good, dark conditions, but this number is highly dependent on visual acuity of the observer and the observing conditions. Also, it varies with the effects of altitude---you'll see many more stars at high altitude if you're breathing pure oxygen, fewer if you're not.

Answer 4

Go to your local library and go to the astronomy section. I just did this, easy when you are a librarian, and got figures from various books from 3000 to 6000. It sort of depends on how good your vision is, the darkness of the sky, atmospheric conditions... One book claims a 6.5 magnitude star is visible. If you go to wikipedia there is a list of the number of stars by magnitude.

Answer 5

9,096

I looked in wikipedia for "list of stars" and then "star catalog" and found out they spell it with a u. About halfway down the page, they talk about the Yale Catalog of Bright Stars, and there's a link to the wiki page Bright_Star_Catalogue.

Answer 6

Count them.

You may find some information in your Encyclopedia Brittanica, or you can perform a survey.

This would be my proceedure if I wanted to know this.

Answer 7

More than hundred, I guess. It various on the weather conditions from day to day. And also cloudiness.

Answer 8

google man it rules

Answer 9

a lot