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WQ #26 Flashcards | Quizlet One of the main projects being carried out by the Hubble Space Telescope is to measure the distances of galaxies located in groups dozens of millions of lightyears away
Before you can use Hubbles Law to get the distance to a galaxy, what . . . To use Hubble's Law to determine a galaxy's distance, you must take a spectrum of the galaxy and measure the redshift of its light Redshift indicates how fast the galaxy is moving away and correlates directly with its distance from us
Hubbles Law - Pennsylvania State University If you know Hubble's constant accurately, then you can calculate the distance to any galaxy in the Universe simply by measuring its velocity (which is reasonably easy to do for any galaxy for which you can observe its spectrum)
Redshift and Hubbles Law - NASA Velocity is measurable thanks to the Doppler shift By taking the spectrum of a distant object, such as a galaxy, astronomers can see a shift in the lines of its spectrum and from this shift determine its velocity Putting this velocity into the Hubble equation, they determine the distance
astro ch 26 Flashcards | Quizlet One of the most important observations in the history of astronomy was the one by Edwin Hubble that established that there are other galaxies, quite removed from the Milky Way
The Hubble Law: Introduction - UW Departments Web Server We must first calibrate the actual size by using a galaxy to which we know the true distance We are looking for galaxies in the sample that are spiral galaxies, as we would use nearby spiral galaxies (M31 the Andromeda galaxy, for example) to calibrate the distances
Hubbles Distance - Redshift Relation - Western Kentucky University To determine the distance to a galaxy one would only need to measure its apparent (angular) size, and use the small angle equation: a = s d, where a is the measured angular size (in radians!), s is the galaxy's true size (diameter), and d is the distance to the galaxy
Before you can use Hubbles Law to determine the distance to a galaxy . . . Before using Hubble's Law to determine the distance to a galaxy, you must measure the redshift of light from that galaxy The redshift refers to how much the light has shifted towards the red end of the spectrum, which is an indicator of how fast the galaxy is moving away from us