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An object that is farther away than another object will have a parallax?
Wiki User
∙ 12y ago
The farther an object is from the observer,
the smaller its parallax is.
Wiki User
∙ 12y ago
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Considering that the more distant an object is the smaller the angle it will make why would parallax measurements be better suited for stars than for galaxies?
At larger distance, the parallax becomes smaller, and therefore harder to measure. Even the closest star (Toliman) has a parallax of less than one arc-second (1/3600 of a degree), which is difficult to measure. Stars that are farther away have a much smaller parallax.
How is a parallax helpful to astronomers?
Parallax is the apparent change in postion of an object when looked at from two different places. Astronomers use parallax to find how far away nearby stars are.
As a celestial object moves farther away from the viewer it will appear .?
smaller
How can parallax be used to determine the distance to nearby stars?
The reciprocal of the parallax is taken. For example, if the stellar parallax is 1 second, the distance is 1/1 = 1 parsec; if the parallax is 0.1 second, the distance is 1/0.1 = 10 parsecs, etc.
If Vega is 25.3 light year from earth and arcturus is 36.7 light years away which star would have a greater parallax explain?
vega its like a triangle the farther away one part is(arcturis) the narower the triangle is (paralax)
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.
Why can't astronomer measure the parallax of a star that is a million lights away?
The farther the object, the smaller its parallax. In this case, the parallax is about 1/300,000 of an arc-second (and an arc-second is 1/3600 of a degree) - way too small to measure. Perhaps you will eventually find a way to measure smaller parallax angles.
If a star's parallax is too small to measure does that mean that it is close or far from Earth?
Nearby stars have a larger parallax angle.
Considering that the more distant an object is the smaller the angle it will make why would parallax measurements be better suited for stars than for galaxies?
At larger distance, the parallax becomes smaller, and therefore harder to measure. Even the closest star (Toliman) has a parallax of less than one arc-second (1/3600 of a degree), which is difficult to measure. Stars that are farther away have a much smaller parallax.
Do sound waves move closer or farther away from a vibrating object?
farther away
How is a parallax helpful to astronomers?
Parallax is the apparent change in postion of an object when looked at from two different places. Astronomers use parallax to find how far away nearby stars are.
Does the size of an object appear to change as the observer moves closer to or farther away from the object?
Yes, the closer you get the bigger the object will appear but to only the size of the object really is, and the farther away you get the small it will get
Parallax would be harder to measure if?
A parallax is hard to measure if it is very small - and this happens when the corresponding object is very far away.
How or with what do people measure a light year?
This can't be measured directly (as in, applying a measuring stick), so the distances are calculated in other ways. Several methods are used; for a start, for nearby stars, the star's parallax is measured. The smaller the parallax, the farther away the star is. Parallax is the apparent change in position, of a star, compared to the far-away background, as Earth moves from one side of its orbit, to the other.This can't be measured directly (as in, applying a measuring stick), so the distances are calculated in other ways. Several methods are used; for a start, for nearby stars, the star's parallax is measured. The smaller the parallax, the farther away the star is. Parallax is the apparent change in position, of a star, compared to the far-away background, as Earth moves from one side of its orbit, to the other.This can't be measured directly (as in, applying a measuring stick), so the distances are calculated in other ways. Several methods are used; for a start, for nearby stars, the star's parallax is measured. The smaller the parallax, the farther away the star is. Parallax is the apparent change in position, of a star, compared to the far-away background, as Earth moves from one side of its orbit, to the other.This can't be measured directly (as in, applying a measuring stick), so the distances are calculated in other ways. Several methods are used; for a start, for nearby stars, the star's parallax is measured. The smaller the parallax, the farther away the star is. Parallax is the apparent change in position, of a star, compared to the far-away background, as Earth moves from one side of its orbit, to the other.
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.
As a celestial object moves farther away from the viewer it will appear .?
smaller
Why can't astronomers measure the parallax of a star that's a million light years away?
At larger distance, the parallax becomes smaller, and therefore harder to measure. Even the closest star (Toliman) has a parallax of less than one arc-second (1/3600 of a degree), which is difficult to measure. Stars that are farther away have a much smaller parallax.
