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Sirius will have a greater angle, because it is closer to us.

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14y ago

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The star Sirius is known to be 8.6 light years away What is the parallax angle?

The parallax angle of Sirius is approximately 0.38 arcseconds. This value indicates the shift in position of the star as seen from Earth due to its motion around the Sun. The parallax angle is used to calculate the distance to nearby stars.


Sirius has a parallax of 0.377 arc seconds How far away is it from earth in arc seconds?

The distance from Earth to Sirius is the reciprocal of its parallax angle, so it would be 1 / 0.377 = 2.654 parsecs away.


If a star's parallax angle is too small to measure what can you conclude about the star's distance from earth?

It means that the distance is greater than a certain amount - depending on how precisely you can measure the parallax.


How does parallax shift varies with distance?

The parallax shift decreases as distance increases. Objects that are closer to an observer will have a larger apparent shift in position when the observer changes their viewing angle, while objects that are farther away will have a smaller apparent shift in position. This difference in the amount of shift is what allows astronomers to use parallax to calculate the distances to nearby stars.


If a star's parallax angle is too small to measure what can you conclude about the star's distance from the earth?

It means that the distance is greater than a certain amount - depending on how precisely you can measure the parallax.


Why can't the parallax effect be used to measure distances to other galaxies?

The parallax angle of such distant objects is way too small to be measured. In general, the farther away an object, the smaller is its parallax angle.


What is the parallax angle of rigel?

.2 arc sec


Parallax would be easier to measure if?

Parallax would be easier to measure if the Earth were farther from the sun. This way, there will be a wider angle to the stars using the parallax method.


Why is the uncertainty in astronomers' knowledge of a star's distance greater for stars that are farther from earth?

I believe that it is all to do with margin of error. The further away the planet, the greater the margin of error in the observations and therefore the greater the uncertainty in their distance from Earth.


Is the larger a parallax shift the closer an object is?

Yes, that's the way it works. A parallax angle of 1" (arc-second) means that the object is at a distance of 1 parsec (that's how the parsec is defined); at a parallax angle of 1/10 of an arc-second, the object would be at a distance of 10 parsec, etc. A parsec is approximately 3.26 light-years.


If a star's parallax angle is too small to measure what can you conclude about the stars distance from earth?

You can conclude that it is farther than a certain distance. How much this distance is depends, of course, on how accurately the parallax angle can be measured.


Apparent movement of a star used to measure its distance from earth?

Parallax is the apparent movement of a star when viewed from different positions in Earth's orbit around the Sun. By measuring this shift in position, astronomers can calculate the distance to the star using trigonometry. The closer a star is to Earth, the greater its parallax angle and the more accurately its distance can be determined.