Moon

• 340,400 kilometers from the earth
• 3476 kilometers in diameter
• Atmosphere-none
• One day lasts 29.5 earth days
• It can be as hot as 100 degrees celcius and as cold as -170 degrees celcius
• Its roughly as wide as Australia

Constellations

• In all, 88 constellations have now been named. About half of them can be seen on a clear night. Some such as the Great Bear are very large. Others such as the Southern Cross or the Crux are very small.

• Many constellations, including the Zodiac ones, were named long, long ago after animals and ancient gods and heroes.

•  Although from earth they seem to be in a group, individual stars in a constellation may be huge distances apart. Some are much father from earth than others.

Stars

• The oldest stars are 15 billion years old
• The largest stars are red supergiantswhich can be 1000 times bigger than our sun
• The hottest stars are called blue supergiants
• The temperature on there outside is five times hotter than our sun
• The smallest stars are neutron stars, at around 15 km across

Pluto

• 5.9 billion kilometers from sun
• 2200 kilometers in diameter
• 1 moon
• Atmosphere-not known
• One day lasts 6.4 earth days

Neptune

• 4.5 billion kilometers from the sun
• 50,000 kilometers in diameter
• 8 moons
• Atmosphere-methane and other gases
• One day lasts about 18 earth hours

Uranus

• 2.9 billion kilometers from the sun
• 51,000 kilometers in diameter
• 15 moons
• Atmosphere-hydrogen, helium and methane gases
• One day lasts about 17 earth hours

Saturn

• 1.4 billion kilometers from the sun
• 120,00 kilometers in diameter
• 18 moons
• Atmosphere-hydrogen and helium gases
• One day lasts about 10.8 earth hours