Guides · 3 pieces
The parts that need explaining.
Everything else here is a computed view. These are the three things readers ask about most: when the station is actually visible, how to read a launch schedule that keeps changing, and what "astronomical twilight" really means.
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10/29
How to see the ISS tonight — and why the pass times never repeat
The station is bright enough to see with the naked eye, but only on the right evening. What a pass looks like, where to look first, and why the times shift every day.
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10/29
NET, window, T-0: how to read a launch schedule without guessing
Why 'NET' is a constraint rather than a promise, what a launch window actually constrains, and why so many launch dates are still TBD a month out.
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10/29
Twilight, explained: when the sky is actually dark enough
Civil, nautical and astronomical twilight are not poetry — they are specific angles of the Sun below the horizon, and they decide what you can see tonight.
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Tonight's plan
Put the reading into practice: your sunset, dark window and targets.