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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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Designing better asteroid explorers

Recent NASA missions to asteroids have used robotic explorers to gather data about the early evolution of our Solar System, planet formation, and how life may have originated on Earth. To design successful robotic explorers, researchers must understand how these explorers impact the surface of asteroids during their touchdown. Researchers conducted lab experiments to determine what happens when explorers and other objects touch down on complex, granular surfaces in low gravity environments.

from Space & Time News -- ScienceDaily https://ift.tt/39dFs0b
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