How many planets can you see with unaided eye?

Answer 1

There are 88 constellations in the night sky. Approximately 6,000 stars
in the night sky are bright enough to be seen without optical aid.

That's in the total sky, for the whole Earth. The number of stars that are
positioned in your sky depends on your location. For example: From the north
pole, exactly half of the stars are always in the sky and the other half never
are, whereas from the equator, every star is in the sky sooner or later.

Answer 2

In general terms, with people of normal vision, there are in total around 8,000 stars observable with the naked eye. This breaks down to 4,000 in the north, and 4,000 in the south, non-overlapping. But in the north, for example, half the stars in your year-round sky are obscured by the sun; so roughly 2,000 stars are visible, on average, in the nighttime sky on any night. And this assumes very good viewing conditions. This may not sound like a very high number, but we have become used to hearing astronomical things described with correspondingly huge numbers. Try coming up with a method of estimating the number of stars you actually see; you probably won't be too far off from 2,000 if you do it carefully. We are talking about stars in the Milky Way; a small number of galaxies and clusters can be seen as 'stars' with the naked eye, but no stars outside of the Milky Way are observable..

Answer 3

About 6000, under very good viewing conditions. Of these, about half (3000 stars) are above the horizon at any one moment. Since there is a lot of extinction (reduction in brightness) for stars near the horizon, the actual number you can see is somewhat less, even under the best viewing condition.

Answer 4

There is no way to find out how many galaxies are documented, but according to the NASA Extragalactic database, there are 4 million named. It is estimated that there are hundreds of billions of galaxies in space.

Answer 5

I've seen it stated in astronomy textbooks that there are roughly 2,500 stars

with visual magnitudes of 6 or brighter. Mag-6 is usually considered to be the

limit of naked eye visibiity. How many of those are in your sky at any given

time depends on the time of night, where you live, the shape of horizon clutter,

and the extent of pollution due to light and particulate matter in your area. But

regarding the stars alone, since you see 1/2 of the sky at any time, you can

take 1,200 as a broad ballpark average in answer to your question.

Answer 6

It is stated that the number of galaxies are in the billions but the ones that have been counted and named are much less. According to the NASA database there are about 4 million names that have been given to galaxies and as the quality of telescopes improve more will be added to the database.

Answer 7

There are probably more than 170 billion galaxies in the observable universe.

There are a lot of galaxies known in the universe. The number is uncertain. Scientists have found over 100,000 galaxies as they create their 3-D map of the universe. Though, there is an estimates 200 billion galaxies in existence.

No one is really sure exactly how many there are. Many millions probably. One thing that might be useful in answering this is a 2 year survey (the 2dF Galaxy Survey) which has just finished. So far they have surveyed 100, 000 galaxies to make a 3-D map of the universe, but their goal is 250,000! And that's certainly not all of them that are out there.

Answer 8

It isn't possible to put an exact number to it, because it all depends on the amount of light pollution, other pollutants and the state of your eyes.

An average person will be a able to see about 2,000 stars, the top limit around 5,000.

Answer 9

You can typically see five planets with the unaided eye: Mercury, Venus, Mars, Jupiter, and Saturn. Uranus and Neptune are usually too faint to be seen without optical aid.

Answer 10

We don't know for sure, but astronomers have so far found about 10,000.