The hottest Astronomy Substack posts right now

Earth's rotation isn't a perfect 24-hour day due to its speed variations caused by gravitational interactions with the Moon and Sun.
The time taken for the Earth to spin once on its axis relative to distant stars is 23h 56m 4.1s, but it needs an extra 3m 55.9s to complete a 24-hour solar day relative to the Sun.
Leap seconds are added to our timekeeping to adjust for Earth's inconsistent rotation speed, managed by the International Earth Rotation and Reference Systems Service.

A group of wise stargazers dream of discovering the oldest twinkling lights in the sky and need a magical telescope.
The magical telescope, James Webb Space Mirror, could see things invisible to the naked eye and helped find the oldest twinkling lights.
The stargazers find the oldest lights made of hydrogen and helium, and continue their starry adventure to uncover more mysteries of the universe.

A kingdom celebrated St. Patrick's Day with a magical sky dance.
A curious brewer discovered the origin of mysterious lights in the sky.
The streaks of light were remnants of a space contraption returning to Earth, creating a wondrous spectacle.

A rare 6-planet system was discovered orbiting a star called HD110067.
Using Cheops and TESS, researchers found that the planets were in orbital resonance.
Studying resonant systems like this can provide insights into how planets form and evolve.

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