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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.
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Astronomers find x-rays lingering years after landmark neutron star collision

It's been three years since the landmark detection of a neutron star merger from gravitational waves. Since that day, an international team of astronomers has been continuously monitoring the subsequent radiation emissions to provide the most complete picture of such an event. Their analysis provides possible explanations for X-rays that continued to radiate from the collision long after models predicted they would stop.

from Space & Time News -- ScienceDaily https://ift.tt/3doJlRZ
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