1. Comparing objects in our Solar System
Size matters!
Comparing objects in our Solar System

2. 1) The study of the formation of the universe is called Cosmology.

3. Solar System
2) Solar System: Consists of the Sun, and everything bound to it by gravity. This includes the 8 planets and their moons, the asteroids, the dwarf planets, all the Kuiper belt objects, the meteoroids, comets and interplanetary dust.

4. Constellation
Constellations describe a group of stars in the celestial sphere (which is simply the sky as apparent to observers on Earth) that were grouped together.
There are a total of 88 constellations.
65)All the constellations are located within the Milky Way Galaxy

5. Galaxy
Galaxy: large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. The Milky Way measures about 100,000 light- years across, and is thought to contain 200 billion stars.

6. Universe
Universe: the totality of known or supposed objects and phenomena throughout space; the cosmos; macrocosm.

7. So sum it up…
We live on planet Earth which is part of our local Solar System.
Our Solar System includes the Sun and everything that orbits the Sun.
Constellations are the groups of stars within our galaxy
Our Sun, is just one Star in the Milky Way Galaxy.
The Milky Way Galaxy is just one Galaxy in the Universe.

8. Let’s Review
Place the following celestial objects in order from largest to smallest:
(Constellation, Galaxy, Universe, Star, and Solar System)
Answer: Universe, Galaxy, Constellation, Solar System, and Star