飞越涡状星系的虚拟影像
影像来源与版权:F. Summers, J. DePasquale, and D. Player (STScI); Music: Into the Wormhole

说明:飞越涡状星系会是什么样的景象?为了呈现其可视化效果,空间望远镜研究所的天文学家和动画师利用哈勃太空望远镜的数据和影像估算了一次涡状星系(M51)的虚拟飞越。涡状星系距离我们仅有2500万光年,其直径足有5万光年,是天空中最明亮、最美丽的星系之一。在虚拟飞越过程中可以看到主要由年轻蓝色恒星、古老浅色恒星、黑暗尘埃带以及亮红色发射星云构成的旋臂。穿过M51还可以看到许多遥远的星系。可视化效果应该被认为是一种延时,否则虚拟摄像机的速度需要非常接近光速。
翻译:北京天文馆

Virtual Flyby of the Whirlpool Galaxy
Image Credit & Copyright: F. Summers, J. DePasquale, and D. Player (STScI); Music: Into the Wormhole

Explanation: What would it look like to fly over a spiral galaxy? To help visualize this, astronomers and animators at the Space Telescope Science Institute computed a virtual flyby of the Whirlpool Galaxy (M51) using data and images from the Hubble Space Telescope. At only 25 million light years distant and fully 50 thousand light years across, the Whirlpool is one of the brightest and most picturesque galaxies on the sky. Visible during the virtual flyby are spiral arms dominated by young blue stars, older lighter-colored stars, dark lanes of dust, and bright red emission nebulae. Many galaxies far in the distance can be seen right through M51. The visualization should be considered a time-lapse, because otherwise the speed of the virtual camera would need to be very near the speed of light.
Astronomy Picture of the Day 05/06/2019