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What do astronomers measure to estimate the distance and motion of a galaxy?
they transmit radio wave frequency to space and check for the their return or reflecting time , same as that used to calculate speed of light, for calculating the distance of galaxy. if the return radio frequency has increased, then they are moving closer to earth and vice versa. thank you
Is our galaxy considered a typical galaxy?
It is sometimes difficult to tell; our judgment of the size of another galaxy is greatly influenced by the DISTANCE to the other galaxy, and the distance to another galaxy is sometimes tough to know with any precision. Astronomers have revised their distance estimates several times, and we cannot know that we're right THIS time. But based on what we currently believe to be true, the Milky Way is a larger-than-average galaxy similar to the Andromeda galaxy.
Why isn't a galaxys size alone useful in determining its distance from Earth?
The only thing that can be directly observed is a galaxy's apparent size (angular size). Since galaxies come in different sizes, this can only give a rough idea of the galaxy's distance from Earth.
What is galaxy redshifted?
Galaxy redshift is much light the Doppler effect. If a galaxy is traveling away from us, the light that it emits and is seen by us is stretched out (the faster we are separating, the stronger the redshift), that means that the wavelegnth is stretched a bit, shifting the light towards red.
How do astronomers determine the speed at which a galaxy is moving?
By examining its spectrum, and identifying absorption lines in it. Lines are shifted toward shorter wavelength if the object is moving towards us. They're shifted toward longer wavelength if the object is moving away from us.
What do astronomers measure to estimate the distance and motion of a galaxy?
they transmit radio wave frequency to space and check for the their return or reflecting time , same as that used to calculate speed of light, for calculating the distance of galaxy. if the return radio frequency has increased, then they are moving closer to earth and vice versa. thank you
What do astronomers called your galaxy?
The Milky Way Galaxy.
How can distance to the Andromeda galaxy be measured?
The distance to the Andromeda galaxy can be measured using various methods, such as parallax measurements, standard candles (e.g., Cepheid variables), and redshift. These methods help astronomers determine the distance of Andromeda from Earth with good accuracy.
How can astronomers redshift a background galaxy that is masked out due to being close to the bright foreground galaxy?
Wavelengths is what allows astronomers redshift a background galaxy that is covered up. This is due to being close to the foreground galaxy.
What is the most accurate way to determine the distance to a nearby galaxy?
The most accurate way to determine the distance to a nearby galaxy is by using the method of parallax, which involves measuring the slight shift in the position of the galaxy as observed from different points in Earth's orbit around the Sun. This method allows astronomers to calculate the distance based on the angle of the shift and the known distance between the observation points.
Suppose astronomers discover a galaxy that contains only old stars.What type of galaxy is it likely to be?
An elliptical galaxy
How does the use of H II regions to find a galaxy's distance differ from the use of Cepheid variables?
H II regions are regions of ionized gas in a galaxy that emit strong emission lines, allowing astronomers to determine the galaxy's distance using spectroscopy. Cepheid variables are pulsating stars with a period-luminosity relationship that allows astronomers to determine distances to galaxies based on their observed brightness variations. While both methods are used to measure extragalactic distances, they rely on different physical properties of objects within the galaxy.
Do most astronomers believe that earth is in a barreled spiral galaxy?
duh were living in a barred galaxy
Is our galaxy considered a typical galaxy?
It is sometimes difficult to tell; our judgment of the size of another galaxy is greatly influenced by the DISTANCE to the other galaxy, and the distance to another galaxy is sometimes tough to know with any precision. Astronomers have revised their distance estimates several times, and we cannot know that we're right THIS time. But based on what we currently believe to be true, the Milky Way is a larger-than-average galaxy similar to the Andromeda galaxy.
Who visited the galaxy or did anyone studied about the galaxy?
It's not possible that we could cross a galaxy. But astronomers study galaxies with huge telescopes.
Why isn't a galaxys size alone useful in determining its distance from Earth?
The only thing that can be directly observed is a galaxy's apparent size (angular size). Since galaxies come in different sizes, this can only give a rough idea of the galaxy's distance from Earth.
How far from earth is the farthest star on the Andromeda galaxy?
Just about as far as the closest star in the Andromeda Galaxy. The diameter of the Andromeda galaxy is ... well, quite huge, but still relatively small, compared to the distance between us and the Andromeda Galaxy. And I believe this diameter may still be smaller than the uncertainty in the distance estimate!
