Unit 1 Planet Earth - The Universe and the Solar System

Fill-in-the-blank flashcards covering the key definitions and concepts from the lecture notes on Unit 1: Planet Earth.

According to astronomers, the universe was formed __________ years ago.

$$13.700\text{ millions}$$

According to astronomers, the universe was formed by "__________".

big bang

The universe is made up of galaxy, Stars, solar systms, plants, moons, aste riods and __________.

commets

Large groups of celestial bodies gathered together are known as a __________.

Galaxy

Our galaxy is the "__________".

Milky way

A __________ is a large ball of gases with its own light and heat.

Star

An example of a star given in the notes is the "__________".

Sun

A __________ consists of a central star and several celestial bodies around it.

Planetary system

A __________ is defined as a rocky sphere that renot around a planet with no light orengy.

Stellites

An example of a stellite provided in the notes is the __________.

Moon