Earth, do we really know all there is to know about it? Well, just look at what’s beneath your feet. Do you really know what is underneath all of that? If one were to take the planet and divide it into different elements, they would end up with 32% iron, 30% oxygen, 15% silicon, 14% magnesium, 3% sulfur, 2% nickel as well as calcium, aluminum and various trace elements.

The Earth’s Rotation is the term given to the Earth turning on its own axis. It rotates counter-clockwise from East to West. The average time it takes for the Earth to complete a rotation relative to the sun is 86,400 seconds (go and do the math). This is known as a Solar Day. A Solar Day has changed in length since the 19th century because of tidal acceleration. A Stellar Day is the Earth’s rotation relative to that of the [...]

Earth is the third smallest planet in the Solar System and is the third planet from the sun. It is the densest planet and is the largest of the four terrestrial planets (Mercury, Venus, Earth and the dwarf planet Ceres).

Earth is the most unique planet in the Solar System because it is the only one that can support life as we know it. Its dense atmosphere serves to protect life on Earth by filtering harmful ultra-violet rays from hitting the surface and vaporizing most meteors before they can strike. In addition, the planet’s average temperatures are comfortable enough to support life.

Texts and descriptions are fine and dandy, but to see planet Earth for what it is is another thing altogether.  Enjoy these pictures of Earth.  

Mass: 5.98 x 1024 Diameter (km): 12756 Mean density (kg/m3): 5520 Escape velocity (m/s): 11200 Average distance from Sun: 1 AU (149,597,890 km) Rotation period (length of day in Earth days): 1 (23.93 hours) Revolution period (length of year in Earth years): 1 Obliquity (tilt of axis degrees): 23.4 Orbit inclination (degrees): 0 Orbit eccentricity (deviation from circular): 0.017 Mean temperature (K): 281 Visual geometric albedo (reflectivity): 0.39 Atmospheric components: 78% nitrogen, 21% oxygen, 1% argon Surface materials: basaltic and [...]

The Earth is around 4.6 billion years old. The Earth is the densest planet in the Solar System. The Earth’s atmosphere is composed mainly of nitrogen (78%), oxygen (21%), argon (.93%), and carbon dioxide (0.03%). Earth’s atmosphere divided in 5 sections from the surface: Troposhere (0-13 km), Ozone Layer (13-25 km), Stratosphere (25-50 km), Mesosphere (50-75 km), and Thermosphere (75-150 km) Earth is the fifth largest planet in the Solar System. The Diameter of the Earth is 12,756 km (7,926 [...]