Particle Horizon

The particle horizon in Cosmology is the maximum distance from which Particle s (of positive or zero Mass ) can have travelled to the Observer in the age of the Universe .

It is different from the Event Horizon :

The particle horizon is defined as the largest Comoving Distance from which Light can have reached the observer — ''at the present moment''. This is also known as conformal time.

The event horizon is defined as the largest comoving distance from which light can ever reach the observer — ''at any time in the future''.

	APPAREL
	BABY
	BEAUTY
	BOOKS
	CAR TOYS
	CELL PHONES
	DVD'S
	ELECTRONICS
	GOURMET FOOD
	GROCERIES
	HEALTH & PERSONAL
	HOME & GARDEN
	JEWELRY
	MUSIC
	MUSIC INSTRUMENTS
	OFFICE PRODUCTS
	SOFTWARE
	SPORTING GOODS
	TOOLS & HARDWARE
	TOYS
	VIDEO GAMES
	SHOPPING HOME

	MORE SHOPPING...

	CATEGORIES ABOUT PARTICLE HORIZON

	physical cosmology

Information About

Particle Horizon