the great circle on a sphere or heavenly body whose plane is perpendicular to the axis, equidistant everywhere from the two poles of the sphere or heavenly body.
the great circle of the earth that is equidistant from the North Pole and South Pole.
a circle separating a surface into two congruent parts.
celestial equator.
Origin of equator
1350–1400; Middle English <Medieval Latin aequātor,Latin: equalizer (of day and night, as when the sun crosses the equator). See equate, -tor
Words nearby equator
equation movement, equation of motion, equation of state, equation of time, equative, equator, equatorial, equatorial coordinate system, Equatorial Countercurrent, Equatorial Current, Equatorial Guinea
The measurements suggest that the asteroid’s rubble pile is unevenly distributed along its surface and is especially light at the asteroid’s equator.
Asteroid Bennu may have been home to ancient water flows|Neel Patel|October 8, 2020|MIT Technology Review
It’s not perfectly round, but larger and cooler at its equator than at the poles, making the poles of the star appear brighter.
A deep-space telescope spied an exoplanet so hot it can vaporize iron|Paola Rosa-Aquino|October 5, 2020|Popular Science
Scientists usually forecast flu seasons’ severity in the north by watching what happens south of the equator, where flu season falls in the middle of the year.
What will happen when COVID-19 and the flu collide this fall?|Tina Hesman Saey|September 18, 2020|Science News
All of the familiar ones orbit in a single plane aligned with the Sun's equator and move in the same direction.
Three stars, warped rings may show how planets end up moving backward|John Timmer|September 3, 2020|Ars Technica
They run parallel to the ground and point toward the equator.
Newfound ‘dunes’ is among weirdest of northern lights|Maria Temming|March 9, 2020|Science News For Students
Yasuni Natonal Park, where the equator meets the Andes, is famed for its fabulous variety of plants and animals.
The Rio+20 Conference Went From Good Intentions to the To-Do List From Hell|Mac Margolis|June 23, 2012|DAILY BEAST
An orbit near the equator was important for a variety of reasons.
An imaginary line forming a great circle around the Earth's surface, equidistant from the poles and in a plane perpendicular to the Earth's axis of rotation. It divides the Earth into the Northern and Southern hemispheres and is the basis from which latitude is measured.
A similar circle on the surface of any celestial body.