যেকোনো শব্দ খুঁজুন, যেমনঃ kappa:
 
1.
When a telescope or astronomical instrument is first used to take an image after construction.
I just started to build a 100 meter optical telescope in my backyard: first light will be in 2038.
লিখেছেন- LegitSciNtech 18 de অগাস্ট de 2011