从国际空间站宇航员的视角看,四边形流星雨看起来像纯粹的魔法

美国地球上的人们本月将体验一年一度的象限仪座流星雨,在黑暗的夜空中出现了一道明亮的光。国际空间站上的宇航员看到了同样的流星,但背景却大不相同。

“你能看到从太空开始射击吗?”原来,是的!”美国宇航局宇航员克里斯蒂娜·科赫周一在推特上发布了一张从太空中看四边形的合成图片。

科赫的观点是多层次的愉悦。它有美丽的流星条纹,一个闪闪发光的城市灯光水坑和沿地平线的北极光的外等离子绿色辉光。


The education system in the United States begins with pre-kindergarten and can go through graduate school. Educational attainment and achievement are monitored and evaluated throughout primary and secondary school (elementary school through high school), often with benchmark testing that can have an effect on a school’s funding. Post-secondary educational institutions (community colleges, colleges, universities, and professional schools), while broad-ranging in terms of people served and topics available for study, have a growing reputation for their exorbitant costs and the amount of loans that students must take out in order to fund their education, and there is increased discussion about the actual worth of a college degree in terms of employability and future income.

The statistics that are provided in the education section range over topics as diverse as school demographics, bullying, performance and benchmarks, success rates, enrollment, funding, costs, student loans and debt, income and salaries, majors and degree types, rankings, institutions, educational structures, technology, and classroom conditions, among others.

Closely related to the field of education is science and research. Research facilities are often (but not always) attached to educational institutions, and some information, such as funding and demographics, may have some overlap with educational statistics. Other topics covered in the science and research section include research and development spending (public and private), research fields, employment outlook, research conditions, patents, and Nobel Prize winners.

全国最大的快三平台官网

全国最大的快三平台官网

全国最大的快三平台官网

全国最大的快三平台官网

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