Year 8 Space Science

Latitude

Distance in degrees north or south of the Equator

Longitude

Distance in degrees east or west of the Prime Meridian

Zenith

The point on the celestial sphere directly above an observer's head

Nadir

The point on the celestial sphere directly below an observer's feet

Celestial Sphere

A model of the sky that appears like a dome overhead, to which the stars are fixed

Azimuth

an angle on the horizon, measured clockwise from north

Elevation

the angle of an object above the horizon

Rotation

The spin of an object around its own axis

Revolution

the orbit of one object around another (or around a point in space)

Order of planets from the sun

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Composition of the solar system

Planets, sun, moons, asteroids, dwarf planets, comets, rocks, meteors

Terrestrial planets

First four planets, relatively small, rocky and solid