Planet 1: Mercury
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Mercury Challenge: 1

Mercury compared to the Earth's moon

View Mercury in Celestia
Closeup of Mercury

What is similar about Mecury and Earth’s Moon?

  1. What is it about Mercury and our Moon that causes them to look so similar?
  2. Which planet has the greatest temperature range from hot to cold?
  3. What is that number?
  4. Why do you think that is?

 

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Quick facts  
Planet Mercury
AU 0.4
Mean Temperature
(C°)
 -183/427
Equatorial Diameter
(km)
 4880
Volume
(Earth=1)
 0.05
Mass
(Earth=1)
 0.055
Density
(gm/cm3)
 5.43
Orbit Velocity
(in km/s)
 48
Orbit Time
(Earth Days)
 88
Orbit Time
(Earth Years)
 0.241
Rotation Time
(Earth Hours)
 1,416
Rotation Time
(Earth Days)
 59
Number of Moons 0

Southwest Mercury seen from Mariner 10
Southwest Mercury seen from Mariner 10
Local Copy

Degas Ray Crater on Mercury
Degas Ray Crater on Mercury
Local Copy

A Mercury closeup
A Mercury closeup
Local Copy

 

 

Celestia Exploration Activity - learn.arc.nasa.gov