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Are all stars like the Sun?
The answer to this basic question has driven the field of astronomy and astrophysics for nearly 100 years.
Explore the answer here by observing stars and comparing their features to those of the Sun - by classifying stars. Your participation will be a major contribution, observing stars never before classified. You can be the very first person to measure the temperature of a star never before measured! This is discovery in the purest sense of the word.

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