Katie Review Quiz LETS GO

-Point where the PLUMB LINE at the place of observation

projected above the horizon meets the celestial sphere.

• -Defined on the celestial sphere vertically above the observer

• Nadir

• Zenith

• Celestial Poles

• Celestial Axis

-Point on the Earth's surface of the celestial sphere

PIERCED BY THE EXTENSION OF THE EARTH'S

POLAR AXIS

• Nadir

• Zenith

• Vertical Zenith

• Celestial Poles

-Point on the celestial sphere

DIRECTLY BENEATH THE OBSERVER

and directly opposite the zenith

• Nadir

• Zenith

• Vertical Zenith

• Celestial Equator

-Prolongation of the Earth's polar axis

• Celestial Axis

• Celestial Equator

• Observer's Horizon

• Great Circle

-Trace in its surface of the intersection of a plane

PASSING THROUGH THE CENTER OF THE SPHERE

• Hour Circle

• Great Circle

• Celestial Equator

• Celestial Axis

-A great circle on the sphere where a plane

PERPENDICULAR THROUGH A PLUMB LINE at the place of

observation and passing through the center of the Earth, cuts the

celestial sphere

• Observer's Horizon

• Observer's Vertical

• Meridian

• Celestial Equator

-A VERTICAL LINE AT THE LOCATION OF THE OBSERVER

which coincides with the plumb line

• Observer's Horizon

• Observer's Vertical

• Celestial Equator

• Vertical Axis

-A great circle which is PERPENDICULAR TO THE

POLAR AXIS OFTHE CELESTIAL SPHERE

-Extension on the plane of the Earth's equator outward

until it intersects the celestial sphere

• Celestial Equator

• Celestial Axis

• Nadir

• Observer's Horizon

-A great circle passing through the

OBSERVER'S ZENITH and ANY CELESTIAL BODY

• -Perpendicular to the horizon, and represents the line of intersection of a

• vertical plane with the celestial sphere

• Vertical Axis

• Celestial Axis

• Observer's Vertical

• Great Circle

-Great circle PASSING THROUGH A CELESTIAL BODY and

whose plane is perpendicular to the sphere of the celestial equator

• Great Circle

• Hour Circle

• Celestial Axis

• Celestial Equator