近木星轨道16：掠过木星
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冥王星的真实色泽
2024年1月28日 Pluto in True Color Image Credit: NASA, JHU APL, SwRI; Processing: Alex Parker Explanation: What color is Pluto, really? It took some effort to figure out. Even given all of the images sent back to Earth when the robotic New Horizons spacecraft sped past Pluto in 2015, processing these multi-spectral frames to approximate what the human eye would see was challenging. The result featured here, released three years after the raw data was acquired by New Horizons, is the highest resolution true color image of Pluto ever taken. Visible in the image is the light-colored, heart-shaped, Tombaugh Regio, with the unexpectedly smooth Sputnik Planitia, made of frozen nitrogen, filling its western lobe. New Horizons found the dwarf planet to have a surprisingly complex surface…
丁基内什小行星的月出
2023年11月4日 Dinkinesh Moonrise Image Credit: NASA/Goddard, SwRI, Johns Hopkins APL, NOIRLab Explanation: Last Wednesday the voyaging Lucy spacecraft encountered its first asteroid, 152830 Dinkinesh, and discovered the inner-main belt asteroid has a moon. From a distance of just over 400 kilometers, Lucy’s Long-Range Reconnaissance Imager captured this close-up of the binary system during a flyby at 4.5 kilometer per second or around 10,000 miles per hour. A marvelous world, Dinkinesh itself is small, less than 800 meters (about 0.5 miles) across at its widest. Its satellite is seen from the spacecraft’s perspective to emerge from behind the primary asteroid. The asteroid moon is estimated to be only about 220 meters wide. Tomorrow’s picture: aurora borealis 丁基内什小行星的月出 影像提供: NASA/Goddard, SwRI, Johns Hopkins APL, NOIRLab 说明: 上星期三，曳航的露西号宇宙飞船遇到了它的第一颗小行星152830…