Flashcards
Unit 1.2 Discovering the solar system
Flashcards do conjunto (9)
- 1What is an astronomerA Scientist who studies the stars and planets.
- 2What is a ConstellationA Constellation is a group of stars that make a pattern in the sky
- 3What is a dwarf planetA dwarf planet is a small celestial body that is in orbit around the sun and is nearly round in shape. it has insufficient gravity to sweep its orbit
- 4What is a Geocentric modelThis is a model of the universe as earth in its centre
- 5What is the Heliocentric modelThis is a model of the universe as the sun in its centre
- 6What is Retrograde motionThis is an apparent loop-like motion of the planets as seen from earth
- 7What are the five visible planetsThey are mercury, venus, earth, mars, jupiter and saturn
- 8Why was pluto not considered to be a planetThis was because of its size and low gravity
- 9What is terrestrialThis is all the rocky planets