THE ATTIC ROOM / NASA / SCIENCE PHOTO LIBRARY THE ATTIC ROOM / NASA / SCIENCE PHOTO LIBRARY
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Timelapse of a view from the International Space Station as it crosses the Earth's terminator, the line between day and night. At lower left are some of the solar panels that provide power to the ISS. These remain illuminated even after the ISS is over the night side of the Earth, as it orbits at an altitude of around 370 kilometres, so it remains sunlit over the night side before moving into the Earth's shadow. Such an arrangement makes the ISS visible from Earth during the evening, and the opposite can occur in the morning before sunrise. The high reflectivity and great extent of its solar array makes the ISS the brightest object in the night sky, apart from the Moon. This view is from the ISS's Zarya module.
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