You have known it for a long time. When he is bursting with us, it is dark on the other side of the planet. This is explained by the fact that our planet is indeed round and therefore that the sun cannot illuminate the earth in its entirety at the same time. But this fact involves one thing in particular: there is a “visible limit” between day and night. This has a name: Terminator Line.
To give you an idea of what it looks like, just watch the video below:
Standing on the Terminator Line: Wher Day Meets Night
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We can also observe this limit when traveling by plane for example or on one side you can start to see the first lights of the sun when on the other, the night is very black.
See the separation of day and night from space
If it looks really impressive to see from Earth, imagine for a moment to see it from space. On the one hand, light, on the other, darkness. And for altitudes where few human beings have been able to go, the Terminator Line is perfectly distinguished.
Look rather:
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And if we focus on earth, it goes without saying that the Terminator line is present on all the planets of the solar system. And the planet on which it would be very easy to study this “Twilight Zone” is Mercury. With a day-free cycle that lasts 176 earthly days, we would have time to observe this captivating phenomenon.

With an unwavering passion for local news, Christopher leads our editorial team with integrity and dedication. With over 20 years’ experience, he is the backbone of Wouldsayso, ensuring that we stay true to our mission to inform.




