The Short Version
computing…Reading the sky…
Darkness
- Sunset
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- True dark begins
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- True dark ends
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- Sunrise
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"True dark" is astronomical twilight's end — the Sun 18° below the horizon, when the sky stops glowing and the faint stuff comes out.
The Moon's Mood
- Phase
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- Illuminated
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- Moonrise
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- Moonset
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Planets Tonight
Computed for your spot, for tonight's dark hours. "Highest" is the best time to look — a planet near the horizon swims in thick air; one 30° up or more is crisp.
The Station
ISS passes tonight
computing…A visible pass looks like the brightest star in the sky, moving fast and steady, no blinking. It's the size of a football field and there are people inside.