# How many stars within 50 light years from earth?

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According to SIMBAD, ~970. But there's a lot of stars within 50 light years whose distances aren't known. There's quite a few stars within 50 light years. To get a good estimate, we should consider how many stars within 20 light years, and go from there.

The nearest 25 light years are really well catalogued, and the current census is 200 stars. Now, through knowledge of Geometry, one can say that if you multiply the radius of a 3D shape by a number, x, the volume will increase by the x^3. Why 3? because it's a 3D shape.

So we double our sphere from 25 to 50 light years. So thus the volume increases by 2^3 = 8 times! So there are 8 times as many stars within 50 light years as there are within 25 light years.

200 * 8 =

1,600 stars (estimate).
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# How many light years from the earth is the sun?

distance of sun-earth . a. It's inconvenient to express a distance this short (!) in light-years since it only takes light about 8 minutes to go that far.. The average distance from the Earth to the Sun is 150 million km. Keep in mind that this is just an average. In reality, the Earth's orbit (MORE)

# How many light years is earth from sun?

The suns light takes 8 minutes to reach the earth. A light year is the distance light travels in a year. So the Earth is 0.133333333 of a light year from the Sun--------------------------------------------------------------------- .1333 is 8/60. You want 8/60/24/365.25=.000015 0.0000158 ligh (MORE)

# How many light years are in a earth year?

None. Even though the two terms sound as if they're two forms of the same thing, they're not. A "year" is a period of time. It's the time between two of the same person's birthdays, the time between two consecutive New Year's Eves, and the time it takes the earth to complete one orbital tri (MORE)

# How many light years from earth to nearest star?

The nearest star to our Sun is Proxima Centauri , an invisibly dim red dwarf at 4.2 light years distance. Technically, Proxima Centauri is the nearest known star. It's at least possible that there could be a similar star or an even smaller "brown dwarf" in orbit around the Sun at a distance of (MORE)

# How many light years are there in stars that are in your sky?

It varies widely, the closest star other than the sun is just over4 light years away, but most of the stars we see are a few dozen toa few hundred light years away.

# How many light years is earth from Jupiter?

if you're asking at its closest place, it doesn't even take a light year, just about 42 light minutes.

# The star closest to Earth 4.2 light years?

The closest star to Earth is Proxima Centauri, which is a binary star with Alpha Centauri. Proxima Centauri is too small to be seen without a telescope, and Alpha Centauri is close, but not all that big either. They are in the southern sky; you cannot see them from North America or Europe.

# Which star is more than a light year away from earth?

All the stars are more than 1 light-year away (except the Sun). The closest star is 4.2 light-years away.

# How many years would it take light to travel from barnard's star to earth?

Barnard's Star is just under 6 light-years from Earth (5.98 ly), so just under 6 years.

# How many Earth years are in a light year?

An Earth year is a measure of the time it takes for the earth to make one complete orbit of the sun. So this is actually a unit of time. A light year is the distance light will travel in one Earth year. So this is a unit of distance. So the two units are not comparable for the reasons of this (MORE)

# If a star is 30000 light-years away how many earth years did light take to get here?

30000 Years. A light year by definition is the distance light travels in one 'earth' year.

# How many light years does it takes for the light of the stars to get to earth?

First of all, a light year is not a measure of time. It is ameasure of distance. A light year is the distance light travels ina year. Second, it depends on the distance of the star. The closes star tous is the sun. Light from it takes 8 minutes to reach Earth. Thenext nearest is Proxima Centauri, fr (MORE)

# How many star systems within 100 light years of earth?

A few years ago the Hipparcos sattelite measured distances to ~120,000 nearby stars, so somewhere there is an exact answer to this question. I don't know to what magniture Hipparcos could measure parallaxes for, and whether it could see the dimmest M dwarfs 100 light years away, so it may or may not (MORE)

# How many light years away are stars?

The nearest star, Proxima Centauri, is 4.2 light years away. More distant stars are thousands or millions of light years away.

# If a star is 93 light years away from earth what does this mean?

Light takes 93 years to travel from that star to Earth. That means it's a very long way away, since light travels at 186,000 miles per second (300,000 km per second).

# How many years does it take for the light of the closest star to reach earth?

4.37 years. the star is Alpha Centauri. That's wrong. The closest star is the sun and it takes 8.3 minutes for light to reach us.. when phrased nearest star it can be a trick question.. Alpha Centauri is the nearest star besides the Sun.

# Do All stars in a constellation have to be within a light year?

No. No star other than the sun is within a light year of Earth.Most of the stars in constellations are dozens to hundreds of lightyears away.

# Of the 20 brightest stars observed from earth how many are within 32 light years of the sun?

6, 7 if you include the Sun . Sun . Sirius . Alpha Centauri A . Vega . Procyon . Altair . Fomalhaut

# How many stars are within 20 light years from earth?

There are a total of 115 stars in 81 star systems within 20 light years from the Earth. The space between these stars is incredibly vast. To give you a sense of this distance, imagine this... Our Sun is nearly 900,000 miles (or 1,400,000 km) across. If you shrunk the Sun down to the size of a grain (MORE)

# What are the chances of the Earth ending within 50 years?

Pretty high if humans keep on polluting the earth and causing the atmosphere to thin out, allowing dangerous radiation into out planet.

# What is the brightness of a star at a distance of 32.6 light-years from Earth?

THat is called the star's absolute magnitude. The standard distance is 10 parsecs.\n THat is called the star's absolute magnitude. The standard distance is 10 parsecs.\n THat is called the star's absolute magnitude. The standard distance is 10 parsecs.\n THat is called the star's absolute magnitu (MORE)

# What is the Farthest star in light years from earth?

"This question has not been answered yet" is probably the best answer. We haven't found the "end of the universe" yet. We have seen stars that are thousands of light years away, but there are still more.

# How many light years are in an earth years?

This is not a proper question. A light year is not a period of time. It is the distance light travels through space in one year's time - about 5.86 trillion miles.

# Scientist recently detected a new born star 100 light years away light from this star takes how many years to reach the earth?

Well the answer is in the question. A light year is the distance it takes light to travel in one year. If something is a 100 light years away, then it will take light ..........

# How many stars within 50 light years?

Values change, but.... With the naked eye about 133 stars are visible within 50 light years. With a telescope the value increases to about 2,000 stars. These values are only for visible stars, there is a high probability that there are brown dwarfs and cooler red dwarfs that have not yet bee (MORE)

# What stars are within 74 light-years of earth?

There are probably hundreds or thousands of those. Here are a few: http:// - [See Related Links] The Wikipedia article also has links to other nearby stars. Note that probably not all stars at that distance have been discovered - some are very faint. It is even speculated that there may be a (MORE)

# How many light years is the farthes star?

There's no way to answer that question until we're sure that we have observed every star, and have measured the distance to every star that we've observed. Since there are somewhere between 200 and 400 billion stars in our galaxy alone, and billions of other galaxies, that day is still a long (MORE)

# How many light years from earth is Ceres?

Much less than a light-year - Ceres is part of our Solar System. The average distance from the Sun to Ceres is about 2.8 AU.

# How many earth years deos it take light to reach earth from a star that is 10 light years away?

10 light years is the distance that light travels through vacuum in 10 years. Therefore it takes 10 years for light to reach us from an object located at that distance from us.

# How many light years are stars from earth?

The brightest and closest star is of course our sun which is 1 AU(150 million Km or 93 million Miles) away from Earth or 8 light minutes. The closest star after that is Proxima Centauri which is 4 light years away. It is one of three stars orbiting each other in the Alpha Centauri system. The (MORE)

# Why are the distance of stars from the earth measured in light years?

The distance between earth and a star is measured in light years for our understanding. The distance between two celestial bodies are so huge that it gives us a lot of difficulties while calculating and while in a speech. Between 1000000000000000 meters and 1 light year obviously 1 light year seems (MORE)

# Why are the distance of the stars from the earth are measured in light years?

The standard measure of distance in the SI (international system of units) is the meter. However, this gives very large distances in the case of stars or galaxies; for example, Rigil Kentaurus is at a distance of 4.3 light-years, each light-year is about 9.5 x 10 15 meters. If you write it out, you (MORE)

# How far is wezen star from earth in light years?

1,800 light years away. it is hotter than our sun (6200 Kelvin) and the radius 195 times that of the Sun, which makes the star almost as big as the Earth's orbit.

# How far from earth is a star that is 7 light years away?

It's exactly 7 light years away. One light year is the distance that light travels through space in one year. 7 of those is a distance of something like 41,150,289,900,000 miles.

# Why is light year use to measure the distance of star to earth?

a lightyear is the distance light travels within a year and because the speed of light is always the same (within a vacuum wich space is) and that currently the speed of light is the fastest possible speed to travel it. We therefore measure distances with this because we know that if we one day ha (MORE)

# How many star systems are within 1000 light years of Earth?

I don't think an exhaustive list exists to be able to give you a specific answer. There are about 50 star systems within 5 parsecs of Earth, so assuming approximately the same density throughout the entire volume (not necessarily a valid assumption), that would be somewhere around a million stellar (MORE)

# What star is nearest to earth with a distance of 4.27 light years?

The closest star to Earth - after the Sun - is called Proxima Centauri. It seems to be part of the Alpha Centauri system.

# Why are Light Years used to measure distance of stars from the Earth?

Because no other unit of distance is large enough. The closest star system to us is 4.2 light years away, which is about 25,000,000,000,000 miles.

# How many stars are more than 15 billion light years from earth?

We don't know. Note carefully here: I am not saying that I don't know, or even that we at Answers.com don't know, I'm saying it's literally impossible for anyone to know.

# How many years would it take for the Northern Star light to reach Earth?

Polaris (North Star) is about 433 light years from us, so that is how long light will take to reach us.

# How fast would you have to travel in order to reach a star that is 50 light years away from Earth when you are 40 years older than you were when you left earth?

You would have to be travelling faster than the speed of light in order to do this. And, theoretically speaking, this would be impossible to do. However, if you were possible to travel faster than the speed of light, you would need to be travelling 1.25x the speed of light (which is about 3.75 (MORE)

# What is the brightness of a star at a distance of 32.6 light years from Earth?

The apparent magnitude a star would have if it were at a distance of ten parsecs (which is about 32.6 light years) from Earth is its absolute magnitude .

# How many millions of light years are the stars away from earth?

Not even close to a million light years away, at least the ones wecan see. All the stars we see in the sky are in our own galaxy, theMilky Way, which is 100,000 light years across. Most of the starsthat are visible to the naked eye are less than 1,000 light yearsaway. Sirius, the brightest star in t (MORE)

# How close is the next star to the Earth in light years?

Aside from our own Sun the next closest star is Proxima Centauri and is 4.243 light years away.

# How many stars are within 12.5 light years of the earth?

You can check the Wikipedia article "List of nearest stars". Note that it is quite possible that not all stars up to that distance have been discovered, since red dwarves and brown dwarves are quite difficult to detect.

# How many planets are within 100 light years of earth?

The exact number is not known. But it does seem that most starshave at least one planet, and probably several planets, at least onaverage. Not even the number of stars in the immediate neighborhoodcan be known for sure, since red dwarves are quite hard to detect. Here is an estimate. The Wikipedia a (MORE)

# What is the furthest star in the galaxy that has been viewed from earth and how many light years away is the star?

The galaxy MACS0647-JD is the furthest star in the gallery that hasbeen viewed from the earth. It is 3.3 billion light-years fromEarth.

# How many star systems are within 50 light years of Sol?

That is not known exactly, since even at such a relatively short distance, many red dwarves will go undetected. You can check the Wikipedia article "List of nearest stars and brown dwarfs" for known stars up to a distance of about 16 light-years, and extrapolate. That is, just assume that a larger v (MORE)

# Why are distances of stars from the earth measured in light years?

Lightyears is a more convenient measurement since it can provideastronomers with a sense of scale since distances of outer spaceare enormous in their size.

# How many light years is nearest star to earth?

The Alpha Centauri star system is the nearest to the earth, and itactually consists of 3 stars locked together in a gravitationalarrangement. They are about 4.3 light years from the earth.