Astronomy
A scientific probing of the universe to derive the properties of CELESTIAL objects and the laws under which the universe operates
Astronomy
How old is the universe?
13.8 billion years
Two most abundant elements in the universe
Hydrogen and Helium
Science that studies the origin and evolution of universe
Cosmology
Four fundamental forces
Strong force, electromagnetic force, weak force, gravity
Explain the origin of the universe and suggest that the universe is part of an expanding system where all galaxies are moving farther away with each passing day.
Big bang theory
Big bang theory was first proposed by Belgian priest in 1920s
George's Lemaitre
Big bang theory was developed by _________ in the1940s
George Gamow
General relativity
Albert Einstein
Hubbles Law
Edwin Hubble
States that an observers view of the universe depends neither on the direction in which he looks or on his location
Cosmological principle
More stars and galaxies are formed
Expansion
Types of universe
Flat, closed, open, accelerating universe
Expansion slows down but never stops
Flat universe
Little gravity that outward expansion goes on forever
Open universe
States that. The universe has always been essentially the same as it is today and that it will continue that way forever
Steady state theory
Proponent of steady state theory
Fred Hoyle
Inflationary theory was developed in 1981 by
Alan Guth
Consist of collection of objects orbiting one or more central stars
Solar system
All things in the solar system comes from the sun
Fission theory-George Darwin 1984