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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.

Astronomers probe the emission from a nearby pulsar wind nebula

Astronomers from South Korea and China have performed a deep X-ray spectral imaging of a bow-shock pulsar wind nebula (PWN) associated with a nearby pulsar designated PSR B1929+10. The new study, published April 29 on arXiv.org, presents the deepest investigation of the system, disclosing important information about the emission from this PWN.

from Astronomy News - Space News, Exploration News, Earth Science News, Earth Science https://ift.tt/2A7PVNr

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