Activity 3: Big bang, the origin and the expansion of the Universe

The big bang starts about 14 billon years ago. The Univers was like a very small bubble.It was very hot and very dense. Then it exploded and the Univers about one second it went form a very small thing to a larger one than a galaxy. 

When the univers it created,  it was sold out and the temperature dropped. Energy became two types of particles: antimatter and matter. More stable particles called protons and neutrons began to form when the Universe had a second.

Our gif

Activity 2: Astronomer's timeline

Activity 1: Fifth astronomers

Name	Date of birth	Main thinking	Image
Albert Einstein	14 March 1879	theory of general relativity (an explanation of gravity)
Galileo Galilei	15 February1564	the Earth revolved around the Sun, which contradicted the belief that the Earth was the centre of the Universe.
Eleanor F. Helin	19 November1932	She disocovered 872 asteroids and several comets
Eratostenes	276 a.C.	Earth measurement
Jocelyn Bell Burnell	15 July 1943	discovery of pulsars — rotating neutron stars that appear to ‘pulse’ since the beam of light they emit can only be seen when it faces the Earth