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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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Placing another piece in the dark matter puzzle

A group of scientists is continuing the search for dark matter within the framework of the "Cosmic Axion Spin Precession Experiment" (or "CASPEr" for short). CASPEr is an international research program that uses nuclear magnetic resonance techniques to identify and analyze dark matter. Very little is known about the exact nature of dark matter. Currently, some of the most promising dark matter candidates are extremely light bosonic particles such as axions, axion-like particles or even dark photons.

from Space & Time News -- ScienceDaily https://ift.tt/2WkTV44
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