Scientific photography and astronomy: Technology applied to understanding the universe

Fernando Abalos Vazquez, Javier Ábalos
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Abstract

In 1925, Edwin Hubble took the first step towards increasing the size of the known universe by several orders of magnitude by using the precarious photographic methods available at the time: glass plates and photosensitive emulsions. Analysing periodic variations in the brightness of certain stars (Cepheids) by using photographs, Hubble was able to show that the distance between Andromeda and the Earth was much greater than previously thought. Thus, Andromeda, previously thought to be a nebula, had to be a galaxy different from our own. Suddenly, the estimated size of the universe went from a few hundred thousand light years to a few billion light years. Since then, the synergy between photographic technology and astronomy has continued to grow.
科学摄影和天文学:用于了解宇宙的技术
1925年,埃德温·哈勃迈出了将已知宇宙的大小增加几个数量级的第一步,他使用了当时不稳定的摄影方法:玻璃板和光敏乳剂。通过使用照片分析某些恒星(造父变星)亮度的周期性变化,哈勃望远镜能够显示仙女座和地球之间的距离比之前认为的要大得多。因此,之前被认为是星云的仙女座星系,必须是一个不同于我们自己的星系。突然间,宇宙的估计大小从几十万光年变成了几十亿光年。从那时起,摄影技术和天文学之间的协同作用不断增强。
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