Facts Facts About About Our Our

UniverseUniverse

The UniverseThe Universe

The The Entire UniverseEntire Universe Size Size

Not SureNot Sure Maybe Trillions of YearsMaybe Trillions of Years May be InfiniteMay be Infinite

The Observable UniverseThe Observable Universe The observable The observable partpart of the of the Entire Entire

UniverseUniverse Can only observe objects when the universe Can only observe objects when the universe

became transparent. It was opaque before. became transparent. It was opaque before. (when no light)(when no light)

Information before this obtained by Information before this obtained by gravitational waves and radiationgravitational waves and radiation

Finite in SizeFinite in Size Radius of Observable universe Radius of Observable universe

From earth to edge: 46.5 billion light yearsFrom earth to edge: 46.5 billion light years Diameter: 92 – 94 billion light yearsDiameter: 92 – 94 billion light years

Age of UniverseAge of Universe

Different ways of calculationsDifferent ways of calculations Big Bang Theory: 13.7 billion yearsBig Bang Theory: 13.7 billion years Other : 15.8 billion yearsOther : 15.8 billion years Estimate Range:10 – 20 billion yearsEstimate Range:10 – 20 billion years

Composition of UniverseComposition of Universe

Things we can observe and see Things we can observe and see Heavy Elements : Earth, planets, moons:Heavy Elements : Earth, planets, moons: 0.03 % 0.03 % Neutrinos:Neutrinos: 0.3 % 0.3 % StarsStars 0.5 % 0.5 % Free Hydrogen & Helium : Nebulas etc Free Hydrogen & Helium : Nebulas etc

0.4% 0.4% Known StuffKnown Stuff Total Total 5 % 5 %

Mysterious Stuff in the UniverseMysterious Stuff in the Universe Dark EnergyDark Energy 70 % 70 % Dark MatterDark Matter 25% 25%

Mysterious StuffMysterious Stuff Total Total 95%95%

Composition of the Composition of the UniverseUniverse

Heavy Elements

0.03%

Neutrinos

0.3%

Stars

0.5%

Free Hydrogen and Helium

4 %

Dark Matter

25 %

Dark Energy

70 %

Cosmological Cosmological CompositionComposition