What the night sky looks like over Foster City, CA

Foster City reads as suburban edge on this dataset's scale. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. Foster City's sky is brighter than 13.9% of the 3,206 cities in this dataset.

The number comes from orbit, not a stargazer's logbook, so treat it as an estimate of sky glow rather than a certified Bortle class.

The nearest darker sky to Foster City

The closest place in this dataset with a meaningfully darker sky is Redwood City, CA, roughly 4 miles away in a straight line, rated rural. Road distance will be more.

Redwood City, CA is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

Foster City against the rest of the dataset

About 32,657 people live in Foster City, CA, sized enough to appear in this dataset of 3,206 incorporated US cities. Among all 3,206 cities here, Foster City ranks 443 from darkest to brightest, 1 being the darkest measured.