The Solar System
A tour of our neighborhood: the eight planets, a famous dwarf planet and the objects in between.
Everything on this list can be seen from your backyard over the course of one month.
Medium: across, down, and diagonally down-right or up-right.
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Everything you need to describe the Moon on any night of the month. The phases run from new moon through crescent, first quarter and gibbous to full moon, then back again as the Moon wanes. Waxing means the lit part is growing; waning means it is shrinking. The list also includes features you can see on the surface (craters, maria), events (eclipses, moonrise) and a special name some full moons carry.
The default layout is Medium on a 13×13 grid. Easy, Medium and Hard each use their own checked layout of the same words, and every one can be printed in standard or large print on US Letter or A4.
Keep a two-week Moon diary: each evening, sketch the Moon's shape and write the phase name from the list. Solvers soon see the pattern from crescent to gibbous and back. On cloudy nights, a moon-phase calendar works as a stand-in.
Crescent · Gibbous · Full Moon · New Moon · Crater · Eclipse · Waxing · Waning · Lunar · Mare · Phase · Harvest Moon · Moonrise · Quarter
A tour of our neighborhood: the eight planets, a famous dwarf planet and the objects in between.
Names to look up on a clear night, plus the cosmic objects that astronomers study beyond them.
What the ground is made of: igneous, sedimentary and metamorphic rocks and the minerals inside them.