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Hubble discovered the most distant galaxies primarily through his observations of redshift, which revealed that galaxies are moving away from us. This shift in the light spectrum indicated that the universe is expanding, allowing astronomers to infer the distance of these galaxies. By analyzing the light from these distant objects, Hubble was able to identify galaxies that were billions of light-years away, pushing the boundaries of our understanding of the universe's size and age. His work laid the foundation for modern cosmology and our understanding of the universe's evolution.
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What did Hubble find out about the most distant galaxies?
Hubble Space Telescope observations revealed that the most distant galaxies are much younger and smaller than those found nearby, providing insights into the early universe. These galaxies often exhibit irregular shapes and higher rates of star formation, indicating they are in a formative stage of evolution. Hubble's findings also support the concept of galaxy formation and evolution over cosmic time, showing that galaxies have grown and evolved significantly since their inception. Additionally, the discovery of these distant galaxies has helped refine the understanding of the universe's expansion and the influence of dark energy.
What was Edwin Hubble's equation?
Hubble's equation states that the velocity at which various galaxies are receding from the Earth is proportional to their distance from us.The law is often expressed by the equation v = H0D, with H0 the constant of proportionality (the Hubble constant) between the distance D to a galaxy and its velocity v. The SI unit of H0 is s-1 but it is most frequently quoted in (km/s)/Mpc, thus giving the speed in km/s of a galaxy one Megaparsec away. The reciprocal of H0 is the Hubble time.
What did Edwin Hubble due to help prove the Big Bang Theory?
Edwin Hubble played a crucial role in providing evidence for the Big Bang Theory by observing the redshift of galaxies. He discovered that galaxies were moving away from each other, and the farther away they were, the faster they were moving. Hubble's observations supported the idea that the universe is expanding, which is a key component of the Big Bang Theory.
How did Edwin Hubble determine that the Great Galaxy in Andromeda is located beyond our galaxy?
That became clear once the telescopes were powerful enough to distinguish individual stars in the galaxies. Before that, they were seen only as "nebulae" (cloud-like objects), and it wasn't clear whether M31 (for example) was part of our own galaxy. M31 is also known as the Andromeda Galaxy.
How did Edwin hubble sub-categorize spiral galaxies?
Hubble devised subcategorization for spiral galaxies first based on whether the galaxy exhibited a bar and then how well the spiral arms were defined. The classes are designated as Sa, Sb, and SC with the Sa class being the most tightly wound. A capital B designation after the S indicates the presence of a bar as well.
What observation did Edwin hubble make about the movement of galaxies?
In the late 1920s, the astronomer Edwin Hubble discovered that most of the galaxies he observed were moving away from Earth.
What important observation did Edwin Hubble make about the movement of galaxies?
In the late 1920s, the astronomer Edwin Hubble discovered that most of the galaxies he observed were moving away from Earth.
What kind of Doppler shift did Hubble observe in these distant galaxies?
Most galaxies exhibit a redshift, meaning that they move away from us.
Who first propsed that the universe is expanding?
The astronomer Edwin Hubble was the first to find evidence of the expansion of the Universe, through his observations of distant galaxies. He observed that light emitted from most of the distant galaxies was more red in color. This is known as the Doppler effect or Doppler shift, where objects that emit a certain wavelength and move away from the observer appear to have a longer wavelength than the true wavelengths to the observer. It's the opposite case when objects emitting waves that are coming closer to the observer. These observations lead Hubble to believe that these surrounding red-shifted galaxies are moving away from us. Since most of the galaxies were moving away from us, and since Hubble found that with increasing distance between the galaxies there is an increasing speed at which they are moving apart, he concluded that the Universe was and still is expanding.
What was Edwin Hubble's equation?
Hubble's equation states that the velocity at which various galaxies are receding from the Earth is proportional to their distance from us.The law is often expressed by the equation v = H0D, with H0 the constant of proportionality (the Hubble constant) between the distance D to a galaxy and its velocity v. The SI unit of H0 is s-1 but it is most frequently quoted in (km/s)/Mpc, thus giving the speed in km/s of a galaxy one Megaparsec away. The reciprocal of H0 is the Hubble time.
How do the speeds at which most nearby galaxies are moving away from the earth compare to the speeds of distant galaxies that are moving away from earth?
Distant galaxies are moving away from Earth at faster speeds compared to nearby galaxies. This is due to the expansion of the universe, where galaxies farther away experience a greater redshift, indicating faster recession velocities. This relationship is described by Hubble's Law, which states that the recessional velocity of a galaxy is directly proportional to its distance from us.
What did astronomers Edwin Hubble discover that led to the formulation of his law?
Basically, his discovery was that most galaxies move away from us; and that the galaxies that are farther away, also tend to move away faster.
What imporatant observation did Edwin Hubble make about the movement of galaxys'?
That most galaxies move away from us; and that the general tendency is that galaxies that are farther away move away from us faster.
What did Edwin Hubble due to help prove the Big Bang Theory?
Edwin Hubble played a crucial role in providing evidence for the Big Bang Theory by observing the redshift of galaxies. He discovered that galaxies were moving away from each other, and the farther away they were, the faster they were moving. Hubble's observations supported the idea that the universe is expanding, which is a key component of the Big Bang Theory.
How did Edwin Hubble determine that the Great Galaxy in Andromeda is located beyond our galaxy?
That became clear once the telescopes were powerful enough to distinguish individual stars in the galaxies. Before that, they were seen only as "nebulae" (cloud-like objects), and it wasn't clear whether M31 (for example) was part of our own galaxy. M31 is also known as the Andromeda Galaxy.
How did Edwin hubble sub-categorize spiral galaxies?
Hubble devised subcategorization for spiral galaxies first based on whether the galaxy exhibited a bar and then how well the spiral arms were defined. The classes are designated as Sa, Sb, and SC with the Sa class being the most tightly wound. A capital B designation after the S indicates the presence of a bar as well.
Is the hubble telescope still in operations today in 2007?
Yes, and better than ever. Google "Hubble Ultra Deep Field" for some of the most amazing pictures you will ever see. Thousands upon thousands of galaxies.
