Answer:

albedo

Answer	Crossword Clue
ALBEDO	Reflection ratio. in astronomy
ALBEDO	Reflective power
ALBEDO	Reflective power in space

ALBEDO	Inner rind
ALBEDO	Ratio of planetary reflectiveness
ALBEDO	Planetary reflected-light ratio
ALBEDO	Astronomer's light ratio
ALBEDO	Planetary light-reflection ratio
ALBEDO	Concept in astronomy
ALBEDO	Whitish inner part of an orange's rind
ALBEDO	Light reflection ratio

ALBEDO	Reflecting power of a planet
ALBEDO	Measure of reflected light
ALBEDO	Light ratio in astronomy
ALBEDO	Reflectivity measure
ALBEDO	Reflective power, as of a planet