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If you determinee that a certain star displayed a large parallax what couls you say about its distance?
Wiki User
∙ 9y ago
If a certain star displayed a large parallax, i would say its distance is not wide.
Wiki User
∙ 9y ago
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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.
Is it true or false astronomers have calculated the parallax angles of millions of stars?
The answer is: yes, just about, maybe. Astronomers had catalogued over 2 million stars with parallax values. However many of the values are estimates and some of the angles are very small.
Why do we use parallax?
As Earth orbits the Sun individual stars seem to move their position against the celestial background. The nearer a star is to is, the greatest that apparent move is. That apparent change in the stars position is known as its parallax. A star close enough to show a change of 1 second of an arc is said to be at a distance of one parsec. No star is actually that close. Proxima Centauri, the nearest start to us after the Sun, is 0.75 of a second of an arc. One parsec is equivalent to 3.76 light years. The farther away a star is, the smaller its parallax. Stars over 50 light years away have a parallax that is too small to measure, even with the most powerful of telescopes. Only about 1000 stars have an accurately measured parallax. Beyond that, the absolute magnitude of a star is used to estimate its distance, which relates to its brightness.
What must happen to an object if a force does work on it?
Move a certain distance since Work Done=Fd
What happens if you drop a compass?
Depends from which height. If it's a short distance chances are it will remain as it was before. If it's from a long distance it will probably be damaged to a certain extent. Basically the same answer if you dropped anything although a compass is certainly more fragile.
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.
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.
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.
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.
Why are scientists unsure of the distance of Deneb from Earth?
There is an uncertainty in ANY distance calculation; more so in astronomy, where you can't apply a measuring tape directly. For example, if you use the parallax method, you can only measure the parallax angle up to a certain precision; the farther the star is from us, the smaller the parallax angle, and therefore the larger will the uncertainty be.Specifically in the case of Deneb, it seems that it is surrounded by a shell of material; this makes it more difficult to measure the parallax exactly.
Parallax cant be used on a star if the star is too?
We can't use parallax to measure a stars distance from the Earth if the star is already too far away. The angles used in parallax measurment are already very small, and if the star is beyond a certain distance from us the angle becomes too small to measure, and no distance can be determined.To date the largest distance that can be measured using parallax, with the Hipparchos sattelite, is about 1 600 light years. This will be improved with the European Space Agencies Gaia mission in 2012 and 2013.
What is meant by parallax of a point on a photograph?
Simple parallax is the angle produced by the difference between the axis of a viewing optic versus the axis of the image forming lens. In non slr cameras (range finders) this is an issue below a certain distance and causes a different image to be captured than what is viewed. The "no parallax point" is the point around which a camera would have to be rotated when constructing panoramic photos using a series of images, so that when the images are stitched together, there is perfect alignment. Where this point is exactly was a subject of debate. Search "no parallax point" to learn more and decide how to find this point in your lens(es).
What does the angle of parallax determine?
Accuracy of readings of e.g. meters and certain optical instruments. Parallax is also used in astronomy for calculating distances to(astronmically)far-away objects.
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Are the crosses on the outside of a Catholic Church displayed a certain way?
No.
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