Question A
Who said the Sun is in the center?
Copernicus
What do we call space that is still growing?
An expanding universe
Who was Ptolemy?
An astronomer who supported the geocentric model.
Which model do we use today?
heliocentric
What is the name of the force that pulls things together?
gravity
What did Galileo see through his telescope?
Moons orbiting Jupiter and phases of Venus.
What is the name of the start of the universe?
The Big Bang
What is redshift (in easy words)?
Light from galaxies looks more red because they are moving away.
What do you call a group of stars , gas, dust held together by gravity?