Which method is used to measure the distance to the most distant galaxies?

For more-distant galaxies, astronomers rely on the exploding stars known as supernovae. Like Cepheids, the rate at which a certain class of supernovae brighten and fade reveals their true brightness, which then can be used to calculate their distance.

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What is the function of distance scale?

The distance scale helps you verify the focus of your subject. to the part of the subject that we would want to maintain in critical focus - i.e. the eye, lip, etc. a horizontal line "-" thru it. One may also ask what is the distance scale? Distance Scale: The most important value for an astronomical object is its distance from the Earth. In other words, it was found that their intrinsic brightness was proportional to their period of variation and, hence, could be used for measuring the distances to nearby galaxies.

What is the astronomical distance?

astronomical unit (AU, or au), a unit of length effectively equal to the average, or mean, distance between Earth and the Sun, defined as 149,597,870.7 km (92,955,807.3 miles). What is red shift in spectroscopy? redshift, displacement of the spectrum of an astronomical object toward longer (red) wavelengths. It is attributed to the Doppler effect, a change in wavelength that results when a given source of waves (e.g., light or radio waves) and an observer are in motion with respect to each other.

Accordingly, can we see a galaxy that is 50 billion light years away?

Could we see a galaxy that is 50 billion light-years away? A. No, because it would be beyond the bounds of our observable universe.