Astronomy events, timezone curiosities, calendar history, and more — posted weekly.
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Above the Arctic Circle, the sun refuses to set for weeks at a time each summer. Here's the science behind one of Earth's most surreal natural phenomena.
The phrase 'once in a blue moon' hints at something rare — but what exactly is a blue moon, and when is the next one? The answer depends on which definition you use.
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On May 29, 1919, a solar eclipse proved Einstein's relativity theory and changed physics forever. This date also marks one of history's most significant moments when science literally bent spacetime.
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The Perseid meteor shower returns this August with up to 100 shooting stars per hour. Here's why astronomers call it the year's most reliable celestial spectacle.
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During Antarctic winter, the entire continent plunges into darkness for months. Here's how humans and wildlife survive the planet's most extreme polar night.
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Jupiter and Saturn are approaching another spectacular celestial dance in late 2026. Here's why this rare alignment captivates astronomers and stargazers alike.
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June 21st marks the summer solstice, when the Northern Hemisphere experiences its longest day and shortest night. This astronomical milestone has captivated civilizations for millennia.
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When planets appear to dance together in our night sky, it creates one of astronomy's most beautiful spectacles. Here's why these cosmic encounters are so special.
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While the summer solstice marks the astronomical start of summer, meteorological summer begins weeks earlier. Here's why we have two different seasonal calendars.
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The Moon doesn't just light up our night sky—it literally moves billions of gallons of water across our planet every day. Discover how this cosmic dance creates the rhythm of the tides.
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The Lyrid meteor shower peaks in late April, offering up to 20 meteors per hour. This ancient shower has been observed for over 2,600 years.
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Seven years after the 2017 eclipse, another total solar eclipse will cross North America on April 8, 2024. This celestial spectacle promises an even more dramatic show with a longer totality phase.
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The spring equinox wandered from March 19th to 21st this year, landing on March 20th. Discover why this celestial milestone shifts dates and what it means for our seasons.
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