history of universe,its formation and evolution

1. UNIVERSE BEFORE BIG BANG AND AFTER
PRESENTED BY: ZOYA SHAHID
PRESENTED TO: DR.SABA

2. UNIVERSE
All about space and time and their contents
Content include
~ Planets
~ Stars
~ Galaxies etc
Spatial size still not known
Observable universe can be measured
Not same like 13.8 b. Y. A

3. BEFORE BIG BANG
Arising questions
 WHY ARE WE HERE?
 WHEN DID UNIVERSE BEGIN?
 HOW DID NIVERSE BEGIN?
 WHAT HAPPENED BEFORE BIG BANG
Can’t found sound basis of BG events
STEPHEN HAWKING STAT.
“there was just nothing before BIG BANG”

4. FORMATION OF UNIVERSE
Proposed models:
 Bouncing Universe
 Hibernating Universe
Prevailing model for observable universe to explain
events of universe formation
THE BIG BANG THEORY (TBBT)

5. TBBT
Huge explosion
HOT matter was dispersed
Matter in temperature belt undergo favorable
changes
Takes time to cool down
Conditions become favorable for life

6. ASSUMPTIONS RELATED
EVENTS OF FORMATION
Origin of materials making rocky planets
Possibility of other origins_ Supernovae
WHAT IS SUPERNOVAE?
 Explosion of star
 Two categories:
- Massive star run out of fuel
- White dwarf stars accumulate excessive
matter
Star had to complete life cycle to become
supernova (chance for planet formation)

7. AFTER BIG BANG
Extremely hot matter
Changes occur
Galaxies formed
Earth, other planets & moon formed
380000 years aftee earth cool down
Continuously expanding
Far way moving speed of galaxies
Life evolution
Proceeds from simple to complex

8. THANKYOU FOR YOUR
ATTENTION