# How to measure the distance between stars?

Triangulate the distance with geometry. If you know the distance between two points in a triangle and the angle between those two and the third, you can calculate the dist…ance between all three. We know the distance to the sun (the nearest star) because we dropped mirrors all over the moon and used them to bounce signals off and then time how long they take to go there and back, calculate the distance and then we've got two sides of the triangle and can figure out the third. We can do the same with other stars. Answer The method outlined above is called "parallax". It is how we establish distances to stars near earth. Since the earth is moving around the sun (and as the guy above says we know the distance to the sun) we can use the "width" of the earths orbit as what we call the baseline. (the bottom of the triangle.) near earth stars (near still being very far away, the order of parsecs) will appear to move against the background of distant stars. We can take measurements from each "end" or the orbit and use them to calculate (as above) the distance to the star. This is best demonstrated by holding your finger up in front of your face and looking at it through one eye at a time, the distance between your eyes serving as the baseline. if you could measure the apparent movement of your finger and you knew the distance between your eyes you could work out how far your finger was from your face. Once we have the distance to a few nearby stars like this we start to use more outlandish methods. Stars tend to fit into various types depending on colour (which indicates temperature) and age. If we know the distance to a star (by parallax) and we know what type it is we can use what is called the "standard candle" method to work out the distances to further away stars of the same type. So - I know that a "type G2V" (the sun) is X bright if it's Y far away... i assume that a G2V which appears much dimmer is much further away - we know that brightness decreases related to the square of distance (can't remember the full equation of the top of my head) so you can use this method to pin down distances for loads of stars provided you can get a fixed reference the "standard candle" - obviously this method has issues, mostly to do with the light from stars being dimmed for reasons other than distance like dust in the way. However it's the best we've got!

# A 20 solar mass star and a neutron star orbit each other every 13.1 days. What is the average distance between them?

This Kepler's Third Law problem can be solved with the following formula: P2 = a3 / (M1 + M2) P = period of rotation in years a = distance between the obj…ects in AUs M1 and M2 = mass of the first and second objects (respectively) in solar masses Average neutron star mass = 1.75 solar masses (about) P = 13.1 / 365 = 0.03589 years (about) a = 0.3037 AU

# How are the distances between stars measured?

A thorough answer would take a long time. I'll try to give a simplified answer. There's more than one way these distances are measured or estimated. The distance to most sta…rs is estimated, not measured. As stars are further away, distance is measured using different methods. This use of different methods as the distance increases is called the "cosmic distance ladder." Method 1: The distance to close stars is measured using trigonometry -- a method called triangulation. This is difficult to explain without pictures. The angular location of the star in the sky is measured. Then six months later, when the earth is on the opposite side of the sun, it's measured again. The difference in these two angles is used to calculate the distance. This only works for nearby stars. Method 2: For intermediate distances a method based on brightness is used. Certain stars brightness pulsates -- they get brighter and dimmer in a rhythmic manner. The maximum brightness of these stars can be calculated based the rate at which they get brighter and dimmer -- the rate their brightness pulsates. Stars get dimmer the further they are away, so by calculating how bright they really are using the above method and then measuring how bright they appear to us, the distance to them can be estimated. The method cannot be used for distant stars. This method is less accurate than method 1 and more accurate than method 3. Method 3: For very distant stars they use a method called "red shift" to estimate their distance. It's believed the universe is expanding and the further away stars are the faster they're moving away from us. As a star moves away from us the color of the light from it changes -- becomes redder and redder the faster it's moving away. By measuring the color of the light from a star they know how fast it is moving away. Then they make calculations about how distant an object is that's moving away that fast.

# What is the distance between stars measured in?

Light years (most common) or parsecs (more scientific)

# Average distance between stars?

What is the length of a piece of string? No-one can know for sure, because there are assumed to be a ridiculously big number of stars in the universe. Proxima Centauri, ou…r nearest star other than the sun, is 4.2 LY away. Sirius A and B are 8.6 LY away You could also look at the related question below.

# What is the distance between two stars?

There is no specific term used for the distance between two stars. We would typically measure this distance in light years or in parsecs, but the distance would be different b…etween any pair of stars.

# Average distance between stars in the solar system?

There is only one star in our solar system, and that is our sun.

# What are the distances between stars measured by?

Stellar distances are measure in light years or parsecs. Distances between galaxies are measured in megalight years or megaparsecs (a million parsecs). One parsec is 3….2615638 light years.

# How do you measure distance between stars?

Astronomers Use a unit called the Light-Year to Measure the Distance between the Stars.:D

# What is the Distance between the Leo stars?

The stars in Leo the Lion (and all the other constellations) are not next to each other. They are all very different distances from Earth and therefor can't be measured …in those terms.

# Distance between two stars?

Depends which stars!

# What are the distances between stars?

Impossible to tell all of them, so the one closet to our sun is Proxima Centauri. It is 4.243 light years away. (24,942,474,700,000 mi)

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In Astronomy

# How is distance measured between the stars?

Triangulate the distance with geometry. If you know the distance between two points in a triangle and the angle between those two and the third, you can calculate the distance… between all three. We know the distance to the sun (the nearest star) because we dropped mirrors all over the moon and used them to bounce signals off and then time how long they take to go there and back, calculate the distance and then we've got two sides of the triangle and can figure out the third.

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# An AU is the average distance between?

An Astronomical Unit (AU) is the average distance between the Earth and the Sun.

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# What is the distance between stars and octan?

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# What are the distances between stars determined by?

For nearby stars we use parallax to estimate the distance. Snap a photograph of the sky, wait six months, then take another. The apparent shift in position, after deductin…g the actual shift, gives us an estimate of the distance as compared to far more distant background stars. One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc, and is equivalent to 3.26 light years. This is how stellar distances are measured. What causes the enormous gulfs between stars are gravitational tides and the enormous empty space through which all these stars drift.

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# What units are for distance between stars?

The correct unit to describe the distance between stars is the "light year", the distance a photon of light would travel (through a vacuum) in a year.