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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.

NASA selects early-stage technology concepts for new, continued study

Future technologies that could enable quicker trips to Mars and robotic exploration of ocean worlds might have started out as NASA Innovative Advanced Concepts (NIAC). The program, which invests in early-stage technology ideas from NASA, industry and academic researchers across the country, has selected 23 potentially revolutionary concepts with a total award value of $7 million.

from Space Exploration News - Space News, Space Exploration, Space Science, Earth Sciences https://ift.tt/3ebd5SA

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