Terminology

synodic

The amount of time required for a given body to return to a given position relative to Earth.

sidereal

The time required for a given body to return to the same position relative to the stars.

albedo

the proportion of the incident light or radiation that is reflected by a surface, typically that of a planet or moon

conjunction

an alignment of two planets or other celestial objects so that they appear to be in the same, or nearly the same, place in the sky.

Perennial

blooms for one season each year

Biennial

grows for two years, but only blooms for one season in the second year

Annual

only lives for one season and then dies

Deciduous

hardwood trees that shed their leaves in the winter

Coniferous

trees that stay green year round (aka evergreens), usually have needle-shaped leaves

tynged

A tynged is the Welsh equivalent of the Irish geis, similar to being under a vow, curse or spell.

tynghedau

plural of 'tynged' - a spell or curse

The amount of time required for a given body to return to a given position relative to Earth.

The time required for a given body to return to the same position relative to the stars.

the proportion of the incident light or radiation that is reflected by a surface, typically that of a planet or moon

an alignment of two planets or other celestial objects so that they appear to be in the same, or nearly the same, place in the sky.

blooms for one season each year

grows for two years, but only blooms for one season in the second year

only lives for one season and then dies

hardwood trees that shed their leaves in the winter

trees that stay green year round (aka evergreens), usually have needle-shaped leaves

A tynged is the Welsh equivalent of the Irish geis, similar to being under a vow, curse or spell.

plural of 'tynged' - a spell or curse