Soru
In general, galaxies are moving away from one another at an increasing rate, carried by the constant expansion of the universe. On smaller scales. however, the gravitational forces between galaxies can be strong enough to overcome this expansion and pull them closer together.Astronomers often use redshift, the phenomenon where light stretches to longer, redder wavelengths as its source moves farther from the observer, to determine the distance between another galaxy and our own The greater the redshift, the farther the galaxy.For instance, the galaxy GN211 has a redshift value of 11.1, making it one of the most distant and ancient galaxies observed. In contrast, galaxy M31, which is moving toward our Milky Way galaxy, has a negative redshift value, also known as a blueshift. What does the text indicate about GN-211? Choose 1 answer A It is moving away from the Milky Way. B Its blueshift value is larger than that of M31. C It is moving closer to M31. D It is one of the closest galaxies to the Milky Way.
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Kıdemli · 10 yıl öğretmeniUzman doğrulaması
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Açıklamak
## Step 1<br />The problem is a reading comprehension question that requires understanding of the given text. The text discusses the concept of redshift, which is a phenomenon where light stretches to longer, redder wavelengths as its source moves farther from the observer. This is used by astronomers to determine the distance between galaxies.<br /><br />## Step 2<br />The text provides two examples of galaxies: GN211 and M31. GN211 has a redshift value of 11.1, which is a high value, indicating that it is one of the most distant and ancient galaxies observed. This suggests that GN211 is moving away from the Milky Way.<br /><br />## Step 3<br />On the other hand, M31 has a negative redshift value, also known as a blueshift. This indicates that it is moving towards the Milky Way.<br /><br />## Step 4<br />Based on the information provided in the text, we can conclude that GN211 is moving away from the Milky Way.
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