MILKY WAY

PLANETS AND STARS

• Sun
• Mercury
• Venus
• Earth
• Mars

PLANETS AND STARS CONT.

• Jupiter
• Saturn
• Uranus
• Neptune
• Moon

THE SUN

• Age: 4.6 Billion Years
• Type: Yellow Dwarf
• Diameter: 1,392,684 km
• Temperature: 5500 C

MERCURY

• Mass: 330,104,000,000,000 KG
• Surface Temperature: -173 to 427°C
• Equatorial Circumference: 15,329 km

VENUS

• Mass: 4,867,320,000,000,000 billion kg
• Equatorial Circumference: 38,025 km
• Surface Temperature: 462 °C

EARTH

• Mass: 5,972,190,000,000,000 billion kg
• One known moon
• Equatorial Circumference: 40,030 km
• Surface Temp: anywhere from -88 to 58 C

MARS

• Mass: 641,693,000,000,000 billion kg
• Equatorial Circumference: 21,297 km
• Known Moons: 2
• Surface Temperature: -87 to -5 °C

JUPITER

• Mass: 1,898,130,000,000,000,000 billion kg
• Known Moons: 67
• Surface Temperature: -108°C

SATURN

• Mass: 568,319,000,000,000,000 billion kg
• Known Moons: 62
• Surface Temperature: -139 °C

URANUS

• Mass: 86,810,300,000,000,000 billion kg
• Known Moons: 27
• Surface Temperature: -197 °C
• Equatorial Circumference: 159,354 km

NEPTUNE

• Mass: 102,410,000,000,000,000 billion kg
• Known Moons: 14
• Surface Temperature: -201 °C

SIZE OF OUR SOLAR SYSTEM

• The Milky Way is a spiral galaxy 100,000–120,000 light-years
• It contains 100–400 billion stars. It may contain as many planets as well.
• The stellar disk of the Milky Way Galaxy is approximately 100,000 ly

AU's

An astronomical unit (abbreviated au sometimes AU and UA)is a unit of length, roughly the distance from the Earth to the Sun.

In regards to space exploration they are useful to measure the distance from planets