CONSTELLATIONS BY SEASON
the northern evening sky through the year: 28 constellations per the Yale Bright Star Catalogue, latitude 40° N, evenings near 9 pm
METEOR SHOWERS
the twelve principal showers of the year · periods, peaks and ZHR per the IMO calendar
PHASES OF THE MOON
eight phases · a full cycle of 29.53 days
MARS
size, distances and time — computed from rotation, orbit and mass
THE SOLAR SYSTEM
eight planets · size, distance, year and day
SPRING AND NEAP TIDES
the Earth–moon–sun geometry that makes the tides swing — after NOAA
THE NAMES OF THE ASANAS
twenty foundational poses: Sanskrit, the searchable spelling, the English name — and how old each one is
BLOOD PRESSURE CATEGORIES
the six AHA categories · 2025 guideline · the higher of the two readings decides
CPR AND CHOKING
the 2025 American Heart Association algorithms, step by step — bystander, trained rescuer, and choking at three ages
DRESS CODES
six lines that turn up on an invitation, and what each one actually asks for — after Debrett’s
THREE HAND STITCHES
backstitch · running stitch · whipstitch — what shows on the face and what the thread does underneath
HANDWASHING
five steps, and the 20 seconds that actually matter