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Would the parallax of a certain star be the same if measured both from earth and also from another planet more distant from the sun?
Wiki User
∙ 12y ago
It depends on how far away the star is. If we are talking about Barnard's star than definitely not. Other more distant stars are probably similar but depending on the sensitivity of the instruments used to measure it they will be off a bit. The important thing to remember is that the size of our section in the solar system given to major planets is relatively small in comparison to the distances between these stars. So while the distance between the observer's location and the stars changes, it doesn't change very much in the grander scheme of things.
Wiki User
∙ 12y ago
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Both the speed and the distance of distant galaxies must be measured accurately.
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Any lens (other than those used exclusively for close up work) can focus on infinity, which is simply put, is the distant horizon. Whether or not you can make out the small detail is another matter.
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an optical illusion misleads us about the relative size or distant of an object by placing it in an unexpected situation
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.
Is a star with no measurable parallax is very close to Earth.?
No, if you can measure no parallax, the star is far away - further than a certain distance.
What object looks as if the position has shifted when it is viewed from different locations this is referred to as?
It is called parallax and is often used for calculating the distance to stars and other distant objects which can't be measured directly.
The apparent shift in the position of nearby stars when compared to distant stars is?
Doug Fany answer: Parallax
How does parallax shift varies with distance?
The closer the star, the greater the parallax angle, which is why you can't measure the distance to very distant stars using the parallax method.
What is a stars parallax?
The parallax refers to the apparent change in the star's position, due to Earth's movement around the Sun. This parallax can be used to measure the distance to nearby stars (the closer the star, the larger will its parallax be).
How distant is a star with a parallax of 2 arcseconds answer in parsecs?
The reciprocal of the 2 - that is, 1/2 or 0.5.
What is a parsac?
I'm not sure what a "parsac" is, but "parsec" is the shortcut name for "PARallax SECond of arc", the distance away from the Sun where another object would appear to have an angular parallax shift of one arc-second as compared to the distant background stars. It is approximately equal to 3.26 light-years.
What is a parallax measure?
Parallax is an apparent displacement or difference of orientation of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines. The term is derived from the Greek παράλλαξις (parallaxis), meaning "alteration". Nearby objects have a larger parallax than more distant objects when observed from different positions, so parallax can be used to determine distances.See Link for more information.
What is the distance to the stars less than 100 light years measured through?
We can't run a measuring tape out to the nearer stars, and it would take too long to bounce a radar pulse off of them (even if it would work!) so we have to use other, less precise measurements. For "nearby" stars - less than a couple hundred light years or so - we can measure their parallax. We take an observation of a nearby star and note the very distant background stars. We repeat that same observation 6 months later, when the Earth is on the other side of its orbit, and see the difference in the nearby star's position relative to the distant stars. This is called parallax, and a star that has a parallax shift of one second of arc is one "parallax-second of arc" - or one "parsec" - in distance. One parsec is approximately 3.26 light years. The limitations should be obvious. The more distant the star, the less the parallax shift, and at some point, we can't measure the difference accurately enough. We have to be sure to select "distant background stars" that are REALLY distant, and how can we know that they are really distant when all of our distance measurements are guesses to begin with?
What is the term for the apparent shift in position of distant objects due to motion of the observer?
The term you're looking for is "parallax." Just a caution for you not to confuse parallax, which does answer your question, with the retrograde motion of some of the planets, which is related but different.
What measures star distance from the Earth?
Stellar Parallax Astronomers estimate the distance of nearby objects in space by using a method called stellar parallax, or trigonometric parallax. Simply put, they measure a star's apparent movement against the background of more distant stars as Earth revolves around the sun.
