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.
Rating Newest Oldest. Best Answer: The closest we come to Neptune is 2,702,622,900 miles. It would take light 4 hours and 2 minutes to make the trip. The farthest distance in our orbits is 2,888,537,100 miles.Light takes 4 hours and 18 minutes for that trip.But that's when Neptune is on the other side of the sun from us and we couldn't send a beam there at that time. Source(s): Tom1564 Â· 8 years ago. Thumbs up. 0. Thumbs down. 0. 1 comment. Loading ...ating Newest Oldest. Best Answer: The closest we come to Neptune is 2,702,622,900 miles. It would take light 4 hours and 2 minutes to make the trip. The farthest distance in our orbits is 2,888,537,100 miles.