Astronomy: Earth in Space/Seasons
Terms in this set (23)
the appearance that objects in the night sky "move" against the typical direction of motion
an imaginary line that passes through Earth's center and North and South Pole
the spinning motion of a planet on its axis
the MOVEMENT of an object around another CAUSED BY GRAVITY
the PATH of an object as it revolves around another object in space
a system of organizing time that defines the beginning, length, and divisions of a year
The two days of the year in which the Sun is furthest north or south of the Equator. On these days the hemispheres experience either the longest or shortest amount of daylight for the year; approximately June 21 & December 21.
Vernal/Spring & Autumnal/Fall - The two days in which the sun is directly overhead at the equator. Neither hemisphere is tilted toward or away from the sun. On these days there is equal day and night everywhere on the Earth; approximately March 21 and September 21.
positioned in or relating to the sky, or outer space as observed in astronomy
the study of the Earth, moon, stars, and other objects beyond Earth's atmosphere
the part of the earth from the equator to the North Pole, numbered 0-90 degrees latitude
the part of the earth from the equator to the South Pole, numbered 0-90 degrees latitude.
an imaginary line drawn around the earth equally distant from both poles, dividing the earth into northern and southern hemispheres and constituting the parallel of latitude 0°.
a sloping position or movement; Earth's slant = 23.5 degrees
half of a sphere
the furthest point in orbit from the sun (or body being orbited); the orbiting body travels the slowest when it's at this point
one of the four quarters the year is often divided; winter, spring, summer and fall
the North Star; a star in the northern hemisphere which the Earth's axis points toward
the closest point in orbit from the sun (or body being orbited); the orbiting body travels the fastest when it is at this point
an elongated circle, or oval shape, the shape of the planets orbit.
Tropic of Cancer
23.5 degrees North latitude
Tropic of Capricorn
23.5 degrees South latitude
the location where the sun's rays are hitting the planet exactly perpendicular to its surface