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Matter & Energy

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multi-wavelength mosaic of the sun

THE KITCHEN SINK  There are a lot of ways to study the sun, as shown in this multi-wavelength mosaic from NASA’s Solar Dynamics Observatory. During the eclipse, physicists will take every possible route to figuring out why the corona is so hot.

2016 solar eclipse

FICKLE FLAMES  Streamers and filaments encircled most of the sun during a solar eclipse in 2016, when the sun’s activity was waning. The Aug. 21 solar eclipse will show physicists what the corona looks like when solar activity has quieted down even more.

Milky Way

CRUNCH THE NUMBERS  Scientists estimate that the Milky Way contains 100 million black holes.

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