DICTIONARY LOOKUP
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Our Nearest Neighbor
Did you know the moon has an atmosphere? NASA's LADEE is headed to the moon to find out more about the mysterious composition of the thin lunar exosphere.

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  News Features People Extreme Facts Dictionary

 
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zenith

The point on the sky directly above the observer.

zodiacal light

a faint glow from light scattered off of interplanetary dust along the plane of the ecliptic.

 
Can't find it? Don't understand it? Ask us.
Q
zenith

The point on the sky directly above the observer.

zodiacal light

a faint glow from light scattered off of interplanetary dust along the plane of the ecliptic.