1. Dumont d’Urville
TS3 Students
HODZIC Amir
SILAS Hervé

2. Present

4. Black Holes

5. Summary 1°) Do black holes really exist ?
2°) What are the characteristics of black holes ?
3°) Could a black hole threaten the Earth ?

6. I°) Do Black Holes really exist ?
Black holes are for some people merely science fiction.
Yet, scientists have many reasons to believe in their existence.

7. 4 ways of detecting black holes
The higher velocity of stars around black holes.
The emission of powerful X-ray..
The presence of masses of gas and dust.

9. 4 ways of detecting black holes
The higher velocity of stars around black holes.
The emission of powerful X-ray..
The presence of masses of gas and dust.
The emission of plasma jet

11. Two similar detectors :
New technologies
Two similar detectors :
VIRGO & LIGO

17. II°) What are the characteristics of black holes ?
Three main characteristics

19. II°) What are the characteristics of black holes ?
Three main characteristics
Different steps of black holes formation

20. 1°) Stellar black holes
Red giant

22. 1°) Stellar black holes
Red giant
White dwarf

24. supernova
Implosion
Explosion
Residue

25. 1°) Stellar black holes
Red giant
White dwarf
Neutron star
Black hole

26. 2°) Galactic black holes
Event horizon : 10 billion large kilometers
Resides in the center of galaxies

27. III°) Could a black hole threaten the Earth ?

28. 1°) If the sun turned into a black hole ?
What would happen :
1°) If the sun turned into a black hole ?

31. 2°) With the black hole in our
What would happen :
2°) With the black hole in our
Milky Way ?

33. 3°) If two supermassive black holes collapsed
What would happen :
3°) If two supermassive black holes collapsed

37. THE END