B C and D, but there's a fair chance I've given you deliberately false information because you're clearly cheating on your homework. In future phrase the question in a less obvious way.
It doesn't. Infact, what is the shape of the galaxy? Where would you draw the perimetres?
1)placing cosmological constraints on the expansion of the Universe through the determination of distances to galaxies 2)to measure many characteristics of our galaxy and our relationship to it
They used a method called "representative sampling" to obtain their estimate. The sky is divided into sections of equal size and the number of galaxies in one section are counted. The count from that one section is then multiplied by the total number of sections in the sky
A light year is the distance light travels in a year. That is roughly 6,000,000,000,000 miles (six trillion miles). Thus such a unit is used only to measure the largest distances, those between stars and galaxies.
The correct spelling is spectroscope. A spectroscope is a scientific instrument that is used to measure properties of light waves. It is an optical device for producing and recording spectra to be examined.
Distances to other planets, other stars and other galaxies are very large, making measurements in meters or kilometers difficult to handle (although scientific notation can be used). As a result, astronomers have gotten accustomed to measure distance within the Solar System in astronomical units, and to other stars and galaxies, either in light-years or in parsecs.
what is the type of star used by the Hubble to measure the distance to other galaxies.
There are over 100 billion galaxies in the universe.
1)placing cosmological constraints on the expansion of the Universe through the determination of distances to galaxies 2)to measure many characteristics of our galaxy and our relationship to it
what is the type of star used by the Hubble to measure the distance to other galaxies.
lightyears
The sun
it is either light years or kilometers
A force meter is a device used to measure forces of the universe. It can measure friction, tension, and gravity.
Volume
They used a method called "representative sampling" to obtain their estimate. The sky is divided into sections of equal size and the number of galaxies in one section are counted. The count from that one section is then multiplied by the total number of sections in the sky
They used a method called "representative sampling" to obtain their estimate. The sky is divided into sections of equal size and the number of galaxies in one section are counted. The count from that one section is then multiplied by the total number of sections in the sky
A spectrometer measures properties of light of a specific part of the wavelength. It is often used to measure the intensity of a light.