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We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.
This stunning 527-megapixel composite reveals both visible and infrared views of young stars, ionized gas, and dust filaments ...
Donald Trump's administration is reportedly cutting over 2,000 high-ranking NASA employees in their latest cost-cutting spree, despite public backlash. According to recently obtained documents, most ...