Thestarsandthegalaxiesintheuniverse2l

1. THE STARS AND THE
GALAXIES IN THE UNIVERSE

2. THE SUN
THE STARS
THE GALAXIES
THE UNIVERSE
A POEM

3. THE SUN
 The Sun is the closest star to Earth and is the center of
our solar system. A giant, spinning ball of very hot gas,
the Sun is fueled by nuclear fusion reactions. The light
from the Sun heats our world and makes life possible.
The Sun is also an active star that displays sunspots,
solar flares, erupting prominences, and coronal mass
ejections. These phenomena impact our near-Earth
space environment and determine our "space weather."
STRUCTURE MAIN MENUCHARACTERISTIC

4. Charateristics of the Sun
 Size: 1 392 000 km in diameter
 Mass: 1.98 x 10³° kg
 Density: 1400kg/m³
 Surface Temperature:5500 °C–
6000 °C
STRUCTURE MAIN MENUTHE SUN

5. The Structure of Sun
CHARACTERISTIC MAIN MENUTHE SUN

6. The Stars
 A Star is a big ball of hot gases. The
gases are mostly hydrogen and helium.
 A Star emits light and heat which are
generated by nuclear reactions.
 Stars vary in brightness. The brightness
affected by its distance from Earth.
LIFE SPAN MAIN MENUTYPES OF STARS

7. The Various Types of Stars
 Stars are classify according to its size,
brightness, surface temperature and colour.
 There are four main groups of stars, namely
-White dwarf
-Neutron stars
-Giants
-Super Giants
LIFE SPAN MAIN MENUSTARS

8. White Dwarf
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9. Neutron Stars
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10. Giant Star
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11. Supergiant Star
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12. The Formation of Stars
 Stars are formed within large clusters of dust
and gases called as nebulae.
 Due to the force of gravity nebula collapses and
spin.
 The spinning clouds pull in more hydrogen gas
over millions of years.
 Collisions occurred between nebula and
hydrogen atoms.
 Hydrogen atoms combine to form helium atoms,
releasing a large amount of heat and light.
LIFE SPAN 1 MAIN MENUTHE DEATH OF
STAR

13. The Death of Stars
 The lifespan of Star is determined by the
original mass of the Star.
 The Star will become either a white dwarf,
neutron Star or black hole when it dies.
LIFE SPAN 1 MAIN MENUTHE FORMATION OF
STAR

14. LIFE SPAN 2 MAIN MENUTHE DEATH OF STAR

15. LIFE SPAN 1 MAIN MENU
THE FORMATION OF
STAR

16. THE GALAXIES
 A Galaxy is a group of stars held together
by gravity.
 There are billions of stars in a Galaxy.
 The main three types of Galaxies are
- Spiral Galaxy
- Elliptical
- Irregular
THE MILKY WAY MAIN MENU

17. Spiral Galaxy
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18. Elliptical Galaxy
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19. Irregular Galaxy
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20. The Milky Way
 It is the name of Galaxy.
 It has spiral shape.
 It contains 200 billions stars.
 Sun is one of the star in Milky way.
GALAXY MAIN MENU

21. THE UNIVERSE
 The Universe contains billions of galaxies
with each galaxy containing billions of
stars.
 Universe is always evolving. Everything
that exits in the universe is not permenant.
New stars are being born while existing
stars will eventually die.
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22. A Poem For The Universe
Up the sky I share
I look up and wish I’m there,
Beautiful and rare
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