2025年8月11日
Closest Ever Images Near the Sun
Video Credit: NASA, JHUAPL, Naval Research Lab, Parker Solar Probe
Explanation: Everybody sees the Sun. Nobody’s been there. Starting in 2018, though, NASA launched the robotic Parker Solar Probe (PSP) to investigate regions near to the Sun for the first time. The featured time-lapse video shows the view looking sideways from behind PSP‘s Sun shield in December during the closest approach of any human-made spacecraft to the Sun, looping down to only about five solar diameters above the Sun’s hot surface. The PSP’s Wide Field Imager for Solar Probe (WISPR) cameras took these images over seven hours, but they are digitally compressed here into about 5 seconds. The solar corona, including colliding coronal mass ejections (CMEs), is visible here in unprecedented detail, with stars passing far in the background. The Sun is not only Earth’s dominant energy source, but its variable solar wind also compresses Earth’s atmosphere, triggers auroras, affects power grids, and can even damage orbiting communication satellites.
Tomorrow’s picture: sky flow
创记录邻近太阳位置拍摄的影像
影片提供: NASA, JHUAPL, Naval Research Lab, Parker Solar Probe
说明: 大家都看得到太阳，但没人去过那里。然而在2018年，NASA发射了无人的帕克太阳探测器（PSP），首次前去探索邻近太阳的区域。这部缩时影片，展示了PSP盘旋而下，航行到离太阳表面约5个太阳直径、抵达有史以来最靠近太阳的位置时，从PSP的太阳遮罩后方，用侧视的太阳探测器广角相机（WISPR）在7小时期间（压缩成约5秒）所拍摄的景观。影片无比清晰的记录了日冕，包括追撞的日冕物质抛射（CMEs），以及从遥远后方背景掠过的恒星。太阳除了是地球的主要能量来源之外，它多变的太阳风也会压缩地球的大气层、触发极光、影响电网，甚至会损坏轨道上的地球通信卫星。
明日的图片: sky flow
