Stellar Evolution
![](https://assets.science.nasa.gov/dynamicimage/assets/science/astro/universe/internal_resources/497/Universe_History_2.png?w=6667&h=3750&fit=clip&crop=faces%2Cfocalpoint)
What is Dark Energy? Inside our accelerating, expanding Universe
11 min read
Some 13.8 billion years ago, the universe began with a rapid expansion we call the big bang. After this initial…
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The Lives, Times, and Deaths of Stars
4 min read
Who among us doesn’t covertly read tabloid headlines when we pass them by? But if you’re really looking for a…
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