ESTIMATE THE SIZE OF OUR UNIVERSE USING DATA FROM COSMIC EVENTS.pdf
ESTIMATE THE SIZE OF OUR UNIVERSE USING DATA FROM COSMIC EVENTS
Assumptions:
1. Our 3-D universe is on the surface of a 4-D globe.
2. Gravitational wave travels within the 4-D globe at speed of light.
3. Gamma-ray, as well as other electromagnetic waves, travels along the surface of the 4-D globe.
As illustrated above, X is the distance of the cosmic event; R is the radius of our 4-D globe; C is speed of light; t is the time difference between detection of gravitational wave and gamma-ray.
X – 2R*sin(X/2R) = C*t
On 8/17/2017, gravitational wave GW170817 was detected. 1.7 seconds later, gamma-ray burst GRB 170817A was detected. The binary stars are 40 Mpc (130 Mly) away.
Put these numbers together, the radius of our 4-D globe is around 1015LY (1000 trillion light-years).
The estimate could be more accurate with more and more cosmic events being recorded.