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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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Research helps people, lunar rovers, get there on time

A graduate student relied on the bus system to get to class. He wanted to understand why, despite arriving at the bus stop on time, he was sometimes late to class. He developed a tool that considers transportation variables weighed against how great a margin of error bus riders are willing to accept, which can also apply to getting a lunar rover to its destination, and with a high degree of reliability.

from Space & Time News -- ScienceDaily https://ift.tt/3mR6LUD
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