0
What is used to measure a stars distance if it can not be measured by parallax?
Wiki User
∙ 12y ago
A million light-years is about 300,000 parsecs; that would mean a parallax of 1/300,000 arc-seconds. Such a small angle can't be measured yet.
A million light-years is about 300,000 parsecs; that would mean a parallax of 1/300,000 arc-seconds. Such a small angle can't be measured yet.
A million light-years is about 300,000 parsecs; that would mean a parallax of 1/300,000 arc-seconds. Such a small angle can't be measured yet.
A million light-years is about 300,000 parsecs; that would mean a parallax of 1/300,000 arc-seconds. Such a small angle can't be measured yet.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoMainly, guessing.
We can identify a star's type by its spectrum, and from that we can make a pretty good guess as to how bright it should be. By comparing that with how bright it appears to be, scientists can come up with a reasonable figure for the distance.
Wiki User
∙ 13y agoI think they use a satellite that is in space. I am not sure, sorry. :)
Wiki User
∙ 14y agoA million light-years is about 300,000 parsecs; that would mean a parallax of 1/300,000 arc-seconds. Such a small angle can't be measured yet.
Add your answer:
Earn +20 pts
The distance to nearby stars can be measured by using?
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.
How do astronomers measure the distance to nearby stars?
Astronomers use a method called parallax to measure the distance to nearby stars. Astronomers can measure parallax by measuring the position of a nearby star with respect to the distant stars behind it. Then, they measure the same stars again six months later when the Earth is on the opposite side of its orbit.
Why must a star's parallax be known before you can find the luminosity?
What must be known is the distance. And the most accurate method to measure the distance of nearby stars is the parallax - but this method won't work for stars that are far away.
Do all-stars have measurable parallax angles?
No, only the closer ones have a parallax that is large enough to be measured. The first star to have its parallax measured was 61 Cygni, measured by Bessel in 1838 and found to be at a distance of 10.3 light years, later corrected to 11.4. The closest star Proxima Centauri has a parallax of only about 0.7 seconds of arc. Before then the absence of parallax for the stars was considered an important part of the case that the Earth cannot be revolving round the Sun.
The distance to nearby stars can be measured by using?
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.
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.
Method to measure the distance to nearby stars directly?
For nearby stars, the parallax method gives the most accurate measure of distances.For nearby stars, the parallax method gives the most accurate measure of distances.For nearby stars, the parallax method gives the most accurate measure of distances.For nearby stars, the parallax method gives the most accurate measure of distances.
How do astronomers measure the distance to nearby stars?
Astronomers use a method called parallax to measure the distance to nearby stars. Astronomers can measure parallax by measuring the position of a nearby star with respect to the distant stars behind it. Then, they measure the same stars again six months later when the Earth is on the opposite side of its orbit.
Why must a star's parallax be known before you can find the luminosity?
What must be known is the distance. And the most accurate method to measure the distance of nearby stars is the parallax - but this method won't work for stars that are far away.
Is parallax a star?
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).
What are the distances to stars measured in?
Astronomers typically measure distances in parsecs. One parsec is the distance of a hypothetical star having a parallax of 1 second of arc; it's about 3.2 light years.
Distance to nearby stars can be determined from?
stellar parallax
Do all-stars have measurable parallax angles?
No, only the closer ones have a parallax that is large enough to be measured. The first star to have its parallax measured was 61 Cygni, measured by Bessel in 1838 and found to be at a distance of 10.3 light years, later corrected to 11.4. The closest star Proxima Centauri has a parallax of only about 0.7 seconds of arc. Before then the absence of parallax for the stars was considered an important part of the case that the Earth cannot be revolving round the Sun.
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).
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.
