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Massive Stars and their approximate Size

Astronomers have found massive stars in the early universe, primarily located in distant galaxies that formed shortly after the Big Bang. These regions are often studied through advanced telescopes capable of observing very distant light, such as the Hubble Space Telescope and the upcoming James Webb Space Telescope. In terms of size, these monster stars can have diameters ranging from about 100 to over 300 times that of our Sun. The Sun’s diameter is approximately 1.4 million kilometers (about 864,000 miles), so these massive stars could be approximately 140 million to over 420 million kilometers (about 87 million to 261 million miles) in diameter.

Hubble Snaps a Galactic Potpourri of Particles

The sharply angled perspective in this Hubble image of spiral galaxy NGC 3169 makes it seem as if we, the viewers, are craning our necks to see over a barrier into the galaxy's bright center. In the case of NGC 3169, this barrier is the thick dust embedded within the galaxy's spiral arms.

from NASA Image of the Day https://ift.tt/2YlsJFR

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