Please enable JavaScript.
Coggle requires JavaScript to display documents.
💫✨stars & galaxies in the universe :star: 🌙 (2) Stars (FORMED from…
💫✨
stars & galaxies in the universe
:star: 🌙
1. Galaxy
set of bodies consisting of millions of
stars
with
gas
and
dust
particles
comes in many forms
spiral galaxies
- milky way
medium large spiral galaxy
consists of approx 200 million stars including the sun
elliptical galaxies
- ursa major
irregular galaxies
- small magellanic cloud
2) Stars
FORMED from
nebulae
, large clouds of dust particles and gases like
helium
a) pulled from
strong gravitational force
, which forms a globe
b) the force causes the globe to
shrink
and
compress
, to form a
core
c) the core
shrinks
&
becomes dense
because of the
strong force
d) nuclear reaction that causes
hydrogen to turn into helium
occurs when the temperature and pressure in the core is too high.
e) the core will then
shine
and a star is formed due to the
heat
and
light energy
to classify stars, observe its
temperature
colour
size
brightness
distance
size of stars
supergent - extremely big
giant - big
dwarf - smallest
DIES When a star like the Sun has
burned
all of its hydrogen fuel
, and expands to become a
red giant.
Eventually forms to be a
dwarf
and becomes
invisible
3) Solar System
our solar system is in the
Milky Way
galaxy
