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CLASS 6 NCERT: CH 1: The Earth in the Solar System - Coggle Diagram
CLASS 6 NCERT: CH 1:
The Earth in the Solar System
Celestial Bodies
The Sun, moon, planets- objects shining in the night sky are celestial bodies.
Stars, planets, asteroids and comets, nebulae, pulsars, moons, star clusters, galaxies, black holes, etc.
STARS
Celestia bodies emit their own heat and light. Ex- Sun.
POLE STAR
: north star indicates the north direction. Brightest star than other stars. Remains in the same positions. "Dhruv Tara".
CONSTELLATIONS
various patterns in the night sky formed by different groups of stars. very prominent - Ursa Major/ Big Bear and the Ursa Minor.
In india, it is call "saptarishi".
PLANETS
celestial bodies does not emit own heat and light. 'Planet' comes from greek 'Planetai' meaning "wanderers".
JOVIAN & TERRESTRIAL PLANETS
Planets move around sun in fixed path called
ORBIT
PLUTO
- considered dwarf planet
MY VERY EFFICIENT MOTHER JUST SERVED US NACHOS
EARTH
- the blue planet- supports life - Goldilock Zone- Geoid shape of Earth- 5th largest planet - flat at poles
Mercury - near to sun; Venus - twin sister of Earth; Jupiter gas giant so is Saturn and Uranus and Neptune
MARS
- two moons - PHOBOS & DEIMOS; highest mountain in solar system is
NIX OLYMPIA
SOLAR SYSTEM
: sun, 8 planets, satellites and other celestial bodies- form solar system.
SUN
: centre - huge - made of hot gases - provides pulling force, binds solar system- ultimate source of heat and light.
MOON
Natural Satellite of Earth.
JUPITER
- 4 major moons -
EUROPA
;
CALLISTO
;
GANYMEDE
;
IO
SATURN
- second largest moon -
TITAN
Uranus
- Ice Giant - 27 moons - presence of methane
Neptune
has 14 moons
OTHER CELESTIAL BODIES
ASTEROIDS
- other than planets, stars and satellites- numerous tiny bodies move around sun.
ASTEROID BELT
btw Mars and Jupiter.
irregular in shape
METEOROIDS
small pieces of rocks moving around sun called meteoroids.
Broken parts of asteroids or planets called
METEORS
when meteors enter Earth's atmosphere - cross mesosphere and burn - due to high friction - called -
SHOOTING STARS
those who does not burn in atmosphere and falls directly on Earth called
METEORITES
COMETS
- icy bodies releases gases as it orbits around sun - vapourise when come close to sun - TAIL appears.
cluster of stars -
GALAXY
MILKY WAY
PERIHELION & APHELION
PERIHELION
- point in orbit of planet or other celestial body where it is closest to the sun.
APHELION
- point in orbit of planet or other celestial body where it is farthest from sun .
APOGEE & PERIGEE
APOGEE
- distance btw earth and moon is very high - 'point farthest'
PERIGEE
- distance btw earth and moon is shortest - moon's orbit closest to earth