home / medterms medical dictionary a-z list / ethmoid sinus definition Medical Definition of Ethmoid sinus Ethmoid sinus: A collection of air cells within the ethmoid bone, a spongy bone which makes up the front of the floor of the skull and the roof of the nose. From the Greek ethmos, sieve + eidos, resemblance = like a sieve.
Confidence votes 84.8K. It takes 4.05 hours to 4.12 hours for light from the sun to reach Neptune, depending where it is in it's orbit. It takes 4.05 hours to 4.12 hours for light from the sun to reach Neptune, depending where it is in it's orbit.
Neptune has the wildest and strangest weather in the entire Solar System. It has huge storms with extremely high winds. Its atmosphere has dark spots which come and go, and bright cirrus-like clouds which change rapidly. Neptune has an average temperature of -353 Fahrenheit (-214 Celsius).On Earth sunlight drives our weather, but Neptune is so far away that it receives a thousand times less sunlight than Earth does. How Neptune gets the energy for such intense weather is still a mystery. 1  Javascript must be enabled to use Cool Cosmos.eptune has an average temperature of -353 Fahrenheit (-214 Celsius). On Earth sunlight drives our weather, but Neptune is so far away that it receives a thousand times less sunlight than Earth does. How Neptune gets the energy for such intense weather is still a mystery. 1  Javascript must be enabled to use Cool Cosmos.