Jerry Coffey
Density of the Earth
[/caption] The density of the Earth is 5.513 g/cm3. This is an average of all of the material on the…
Size of the Earth
[/caption] The size of Earth, like the size of all of the celestial bodies, is measured in a number of…
Why Does Jupiter Have the Great Red Spot?
Frequently, readers send us questions here on Universe Today. One very good question is ''why does Jupiter have the Great…
What is Geology?
Contrary to wide spread rumors, geology was not invented just to destroy your grade point average in high school. Many…
Size of Mars
[/caption]The size of Mars can not be given in one set of numbers. Scientists describe a planet by many factors.…
What is the Atmosphere Like on Mars?
The atmosphere of Mars is less than 1% of Earth's, so it does not protect the planet from the Sun's…
Size of Venus
[/caption] The size of a planet is measured in many ways: mass, volume, equatorial diameter, and surface area are the…
Mass of Venus
[/caption] The mass of Venus is 4.868x1024 kg. That is about 82% of the mass of Earth. Alright, end of…
Life on Mercury
[/caption] Mercurian world is one of extremes. 700 Kelvin on the side exposed to the Sun, yet some areas are…
Planet Closest to the Sun
[/caption]Mercury, the planet closest to the Sun, is a study in extremes and offers many surprises. The extremes of the…