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bigray69
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what is the best method to measure gravitational redshift using a small telescope ?
and in which stars the effect is the strongest ?
and in which stars the effect is the strongest ?
bigray69 said:what is the best method to measure gravitational redshift using a small telescope ?
and in which stars the effect is the strongest ?
Chronos said:Pardon my extrasolar assumption. I still doubt you can do this reliably without very expensive instruments.
bigray69 said:what is the best method to measure gravitational redshift using a small telescope ?
and in which stars the effect is the strongest ?
I deem that 'expensive', and, useless for extrasolar redshift measurements using an amateur size telescope.twofish-quant said:... Looking over how to build a magnetic-optical filter that will let you see solar gravitational redshift, I'm guessing that it can be built for about $10K in parts.
Redshift is a phenomenon where light from objects in space appears to shift towards the red end of the electromagnetic spectrum. This is caused by the Doppler effect, which is the change in frequency of light due to the motion of the source. Measuring redshift is important because it provides valuable information about the distance and movement of celestial objects.
There are several methods used to measure redshift, including spectroscopy, photometry, and interferometry. Spectroscopy involves analyzing the spectrum of light emitted by an object to determine its redshift. Photometry measures the brightness of objects at different wavelengths, while interferometry uses the interference patterns of light to calculate redshift.
The accuracy of redshift measurements depends on the method used and the quality of the data collected. However, most methods have a high level of accuracy, with errors typically ranging from 0.01% to 5%. Improvements in technology and data analysis techniques have also led to more precise measurements in recent years.
One limitation of redshift measurement methods is that they are only accurate for objects that are relatively close to Earth. For objects that are extremely far away, the redshift measurements can be affected by other factors such as cosmic expansion and gravitational lensing. Additionally, the accuracy of the measurements can be affected by the quality of the instruments and the conditions of the observation.
Redshift measurements are crucial in studying the universe as they provide information about the age, size, and expansion of the universe. By measuring the redshift of different objects, scientists can also determine the distances between them and map out the large-scale structure of the universe. Redshift measurements also help in understanding the evolution and behavior of galaxies, as well as the distribution of dark matter and dark energy in the universe.