The red supergiant star in orion is called betelgeuse and
The red supergiant star in Orion is called Betelgeuse and its distance is 130 pc. What is the parallax of this star? How much brighter is a star of magnitude 0 than a star of magnitude +5?
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the red supergiant star in orion is called betelgeuse and its distance is 130 pc what is the parallax of this star how
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