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How Many Galaxies Are There? | Space
Everything is in the Universe, and there is nothing larger than the Universe. Evidence includes Hubbles Law and Cosmic Background Radiation . Galaxies. A galaxy is a large group of stars, gas, planets, rock, and dust held together by gravity. There are . billions. of …
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[DOC File]Multiwavelength Galaxies
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To Say: Wow, IF it turns out there really are that many intelligent civilizations in our galaxy, we can hope to hear from at least one of them. We may even detect their presence in sky surveys that are looking for planets around nearby stars. Slide 16: In the Meantime. To Say:
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[DOC File]Universe, Galaxies, Solar System
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The Milky Way galaxy is approximately 100,000 light years across. The Milky Way is a spiral galaxy, which means that it is shaped a bit like a pancake, and this measurement of 100,000 light years is the width of the galaxy at its widest (see image below). This takes care of requirement 1.
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[DOC File]Beyond Einstein Lesson - NASA
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Also, many pictures have poor resolution and are highly pixilated (especially in the radio band). This is usually due to differences in telescopes used to gather the images. Ask students if different parts of a galaxy are seen more easily in some wavelengths than others (e.g. spiral arms, core, dust, gas, stars). Answers to matching activity:
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[DOC File]Exploring Our Solar System
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In all, the number of galaxies in the image implies that there are tens of billions of galaxies in the observable universe. Take a closer look at the reproduction of the Hubble Deep Field. Next to many of the galaxies is the redshift, z, for that galaxy (except for a few cases, the corresponding galaxy is usually
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[DOC File]The Hubble Deep Field
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If there were particular cases which you found most perplexing (such as a galaxy that seemed to belong equally well to two rows), make a note of them as well. (For example, “The last galaxy on the right in row #2 could have gone in row #3 as well, if I prioritized shape over color.”) Replace this text. 3.
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How many galaxy are there