Astronomy events, timezone curiosities, calendar history, and more — posted weekly.
Get new posts in your inbox. No spam, unsubscribe any time.
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.
Read →
Every few years, timekeepers add an extra second to our clocks to keep atomic time aligned with Earth's rotation. Here's why this tiny adjustment matters more than you think.
Read →
In 1752, Britain and its colonies literally skipped 11 days, jumping from September 2nd to September 14th overnight. This dramatic calendar reform changed how we measure time forever.
Read →
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.
Read →
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.
Read →
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.
Read →
Jupiter and Saturn are approaching another spectacular celestial dance in late 2026. Here's why this rare alignment captivates astronomers and stargazers alike.
Read →
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.
Read →
While most of us spring forward and fall back twice yearly, some regions stay put. Discover the fascinating patchwork of DST policies around the world.
Read →
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.
Read →
While the summer solstice marks the astronomical start of summer, meteorological summer begins weeks earlier. Here's why we have two different seasonal calendars.
Read →
Beyond the Arctic Circle, summer means 24 hours of daylight for months. Discover the science behind this extraordinary phenomenon and where to witness it.
Read →
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.
Read →
In October 1582, people went to sleep on October 4th and woke up on October 15th. Here's the fascinating story of the Gregorian calendar reform.
Read →
Every four years we add an extra day to February, but the story behind leap years is far more complex than you might think. From ancient Roman calendars to modern precision, discover the fascinating mathematics of keeping time.
Read →
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.
Read →
Most people think time zones are simple hour-long chunks, but the world is full of surprising timezone quirks. From 30-minute offsets to countries with dozens of zones, time gets weird.
Read →
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.
Read →
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.
Read →