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2. File:Hubble Tuning Fork diagram.svg - Wikipedia

   en.wikipedia.org/wiki/File:Hubble_Tuning_Fork...

   As one of the first steps towards a coherent theory of galaxy evolution, the American astronomer Edwin Hubble, developed a classification scheme of galaxies in 1926. Although this scheme, also known as the Hubble tuning fork diagram, is now considered somewhat too simple, the basic ideas still hold...

3. Galaxy morphological classification - Wikipedia

   en.wikipedia.org/wiki/Galaxy_morphological...

   Tuning-fork-style diagram of the Hubble sequence Galaxy morphological classification is a system used by astronomers to divide galaxies into groups based on their visual appearance. There are several schemes in use by which galaxies can be classified according to their morphologies, the most famous being the Hubble sequence , devised by Edwin ...

4. Hubble sequence - Wikipedia

   en.wikipedia.org/wiki/Hubble_sequence

   Tuning-fork style diagram of the Hubble sequence. The tuning fork scheme divided regular galaxies into three broad classes – ellipticals, lenticulars and spirals – based on their visual appearance (originally on photographic plates). A fourth class contains galaxies with an irregular appearance.

5. Galaxy formation and evolution - Wikipedia

   en.wikipedia.org/wiki/Galaxy_formation_and_evolution

   Hubble tuning fork diagram of galaxy morphology. Because of the inability to conduct experiments in outer space, the only way to “test” theories and models of galaxy evolution is to compare them with observations. Explanations for how galaxies formed and evolved must be able to predict the observed properties and types of galaxies.

6. File:Hubble classification scheme.svg - Wikipedia

   en.wikipedia.org/wiki/File:Hubble_classification...

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   However, dissolving years of filler had left Stobart with what she calls "extreme" skin sagging, and at 34, she decided to bypass less invasive procedures like the "ponytail" facelift and go for a ...

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   This tree comes in a wide range of sizes, from as small as 4.5 feet to a towering 15-foot option, and it was one of the most full and lush products we tested, with more than 2,000 branch tips on ...

9. 10,000 Steps Per Day Is A Myth—So How Much Should You Really ...

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   The 10,000 steps per day rule isn’t based in science. Here’s what experts have to say about how much you should actually walk per day for maximum benefits.