Big bang timeline

1. Big bang timeline Fill in your missing data

2. The big bang • 0 to 10-43 seconds • Temperature- theorized to be infinite • Infinitely small, Infinitely Dense, Primeval Fireball • Only 1 force exists- Supergravity

3. Planck time • 10-43 seconds • Temperature- 1032 Kelvin • Earliest known time that can be described by Modern physics • 2 forces- Gravity, and Grand Unified Theory GUT

4. End of GUT • 10-35 seconds • Temperature- 1027 Kelvin • 3 forces exist- Gravity, Strong Nuclear Force, Weak Force • Quarks and Leptons form (along with their anti-particles)

5. Inflation • 10-35 to 10-33 seconds • Temperature- 1027 Kelvin • Universe increases in size by a factor of 1030 to 1040

6. End of unified forces • 10-12 seconds • Temperature- 1015 Kelvin • 4 forces found in nature- Strong, Weak, Electromagnetic, and Gravity • Protons and Neutrons begin to form from quarks

7. Heavy Particles • 10-7 seconds • Temperature- 1014 Kelvin • Protons and Neutrons forming at full speed

8. Light particles • 10-4 seconds • Temperature- 1012 Kelvin • Electrons and their opposite particles (positrons) form

9. Nucleosynthesis • 100 seconds • Temperature- 109 -107 Kelvin • Helium, Deuterium, and a few other elements form

10. Recombination/Decoupling • 380,000 years • Temperature- 3000Kelvin • Matter and Radiation separate • Radiation domination ends and matter takes over the Universe

11. Galaxy formation • 400-500 million years • Temperature- 10Kelvin • Galaxies and other large structures form in the Universe

12. Now • Approximately 13.7 billion years later • Temperature- 3 Kelvin • We sit here and take these notes today…