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In astronomy, stellar classification is the classification of stars based on their spectral ... The sequence has been expanded with classes for other stars and star-like ..... This is essentially the modern form of the Harvard classification system.


Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming ...


May 18, 2016 ... Stars come in many different sizes, colors, and types, and understanding where they fit in the ... A protostar is what you have before a star forms.


Jun 13, 2016 ... Different Types of Stars in the Universe - Physical characteristics and ... Stars less than 10 solar masses will shed their outer layers to form ...


Stars form in dense molecular clouds within galaxies. .... A different sequence, the CNO cycle (for carbon-nitrogen-oxygen) dominates in higher mass main ...


Apr 26, 2017 ... Stars live very different lives depending on the masses they have when they form. ... The simple fact is that the universe is made up of many different types of stars. ... When it begins to form from a cloud of gas and dust?


Dec 3, 2015 ... ... own Sun, they are trying to discover patterns and features that indicate what types of planets are likely to form around different kinds of stars.


On it, astronomers plot stars' color, temperature, luminosity, spectral type, and evolutionary stage. This diagram shows that there are 3 very different types of ...


Jun 13, 2012 ... But new research shows that small planets can form around very different types of stars -- also stars that are relatively poor in heavy elements.


Dec 16, 2014 ... Learn how stars form, how stars and constellations are named, what ... Also, different astronomers over the years have compiled star catalogs that use ... Most consist of an abbreviation that stands for either the type of star or a ...