When an average-sized star reaches the end of its main sequence life,it becomes a T Tauri star.
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Q1: The stellar remnant left at the end
Q2: Heavy metals from the expulsion of elements
Q3: Emission nebulae are glowing,ionized clouds of gas,powered
Q4: Of the three phases of matter-gas,liquid,and solid-solids
Q6: A dark nebula is a large cloud
Q7: A planetary nebula may take millions of
Q8: It can take hundreds of billions of
Q9: The stellar remnant that will be left
Q10: A nebula that emits its own light
Q11: Our Sun is currently undergoing the triple-alpha
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