About time keeping, the definition of “sidereal” is “of or with respect to the distant stars (i.e. the constellations or the fixed stars, not the sun or planets)”, as defined after a google search.

Scientists have calculated the rotational speed of asteroid 2024 BX1, which exploded over Berlin earlier this year, by ...

Astrologers can look at the chart and use this math to see where you’re compatible (or not) with another person. For example, ...

Understanding how your sign operates can offer you a deeper perspective on life—and your place in the universe.But Western ...

Approximately every four years, we have an extra day in February called a Leap Day. Similar to daylight savings, the ...

This is known as a sidereal month. It's worth noting that the Moon's orbit isn't considered regular—it has variations, and there are upwards of five different months that astronomers recognize.

Argyle, Bob Swan, Mike and James, Andrew 2019. An Anthology of Visual Double Stars.

the phases of the moon ; the eelipses ; apparent and sidereal time ; a celestial sphere showing the precession of the equinoxes, the solar and lunar questions for the reduction of the mean motion ...