Our Earth in the Universe

By : Ishank Kaushik

What is the universe?

The universe is….basically, everything.

Scientifically, it’s defined as the totality of

everything that exists, including all physical

matter and energy, ranging from the smallest

atom to the biggest galaxy—the planets, stars,

everything

Kinds of Galaxies

Some galaxies are very small with only a few million

stars. While other could have as many as 400 billion

stars, or even more.

There are three kind of galaxies, Spiral, Elliptical, and

Irregular. The only difference between the three is

what shape they are.

Spiral Elliptical Irregular

A hundred to four hundred billion stars

5

The Milky Way as seen from the Enterprise

A hundred thousand light years across

Light would take

1,00,000 years to

travel across the

galaxy.

What is our Solar System?Our solar system

consist of central star (the

Sun), the eight planets

orbiting the sun, moon,

asteroids, comets, meteors,

interplanetary gas, dust,

and all the “space” in

between them.

The eight planets of the

Solar System are named of

Greek and Roman Gods

and Goddesses.

PLANETS

Planets are large celestial objects which revolve

around the sun in close elliptical paths are called

orbits. The eight planet of solar system are :-

a)Mercury b)Venus c)Earth d)Mars e)Jupiter

f)Saturn g)Uranus h)Neptune

Planets have no light of own. A planet is made up of

rock & metal, or gas. All the planets revolve around

the sun are also rotate on its axis.

STARS

• Stars are the celestial objects

that are extremely hot & have

light of their own.

• The stars appear to be small

because they are very, very far

away from us.

• The “SUN” is the star which is

nearest tot the earth. The sun

looks much bigger and brighter

because it is much nearer to us

than any other star.

What is Constellations?• The group of stars which appears

to form a recognisable pattern is

known as constellations. Each

constellation has been given a

name signifying an animal, a

human being or some other object

which it appears to resemble.

• Some of the important

constellations which can see

during night sky are ursa major,

orion, cassiopeia, leo major

The SUN

The sun is a star. It is a star around earth & other planet

which revolve. The sun is a star having a system of

planets around it with life of one of its planets

“EARTH”. The sun is a extremely hot object having

temperature 6000 degree celsius. The sun is not a

solid object. The sun consist of mostly hydrogen gas.

The sun is the main source of heat and light energy for

all the planets of the solar system & their satellites.