| TIME PERIOD | PHYSICAL CONDITIONS | GASES PRESENT |
| 0-1 BILLION YEARS | LOTS OF U.V. VERY HOT (>100C) NO LIQUID WATER LOTS OF CHEMICAL REACTIONS 50-100% COOLER SUN ACTIVE GREENHOUSE U.V. GAS DESTRUCTION LOSS OF H, He TO SPACE |
H, He, CH4,
NH4, SO2, CO2, H2O, others (nasty mix) |
| 1-3 BILLION YEARS | LOTS OF U.V. COOLER (<100 C) LIQUID WATER CO2 REDUCTION BY * CO2/SiO2 CYCLE * UNDERWATER PLANTS WARMING SUN ACTIVE GREENHOUSE |
No H, He N2, CO2, H2O |
| LAST 2 BILLION YEARS | CO2 IN
ROCK/OCEAN GREENHOUSE REGULATION EPISODIC ICE AGES OZONE LAYER ON TOP * LIFE ON LAND POSSIBLE TODAY'S SOLAR FLUX |
N2 80% O2 20% 300 ppm CO2 H2O VAPOR |
NOTE: THERE IS ALSO THE POSSIBILITY OF HOUSE-SIZED COMETS
DELIVERING
WATER THROUGHOUT ALL THESE PERIODS
| FUTURE | INCREASING SOLAR FLUX INCREASED EVAPORATION OF WATER WATER INDUCED GREENHOUSE EFFECT INCREASING TEMPERATURE LIFE EXTINCTION IN NEXT 1 BILLION YEARS (NO MORE LIQUID WATER) DECREASING OXYGEN/OZONE U.V. BREAK-UP OF WATER VAPOR LOSS OF HYDROGEN TO SPACE |
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COMPOSITION OF OBJECTS IN SOLAR SYSTEM
Note:
All percentages are % by mass, not number of atoms or
molecules.
| OBJECT OR LOCATION | % H | % He | % HEAVIER ELEMENTS |
| Interstellar medium in our part of the Galaxy; our Sun when young | 78% | 20% | 2% |
| Jupiter's atmosphere | 79% | 19% | 2% |
| Inner rocky planets | Nearly 0% | Really near 0% | Nearly 100%** |
** - mostly carbon, oxygen, magnesium, silicon, sulfur, iron, nickel