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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.

First look: Chang'e lunar landing site

On Jan. 3, 2019, the Chinese spacecraft Chang'e 4 safely landed on the floor of the Moon's Von Kármán crater (186 kilometer diameter, 116 miles). Four weeks later (Jan. 30, 2019), as NASA's Lunar Reconnaissance Orbiter approached the crater from the east, it rolled 70 degrees to the west to snap this spectacular view looking across the floor toward the west wall.

from Space Exploration News - Space News, Space Exploration, Space Science, Earth Sciences http://bit.ly/2Gc7z49

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