Astronomy
Earth’s Mantle
[/caption] The ground under your feet might seem solid, but you're standing on a relatively thin crust of rock above…
Earth’s Outer Core
[/caption] Deep within the Earth, thousands of kilometers below your feet is the core of the Earth. Once thought to…
Earth’s Inner Core
[/caption] Deep beneath the Earth lies the core. This is a ball of solid metal surrounded by liquid metal. The…
Core of the Earth
[/caption] Scientists believe that deep down inside the Earth, there's a huge ball of liquid and solid iron. This is…
Earth’s Early Atmosphere
[/caption] The atmosphere we enjoy today is radically different from the atmosphere that formed with the Earth billions of years…
Composition of the Earth’s Atmosphere
Breathe in and you can appreciate that the Earth's atmosphere has everything needed to support life on Earth. But what's…
Size of the Earth
[/caption] The size of Earth, like the size of all of the celestial bodies, is measured in a number of…
New Theory: Olympus Mons Could Harbor Water, Life on Mars
Olympus Mons is the latest hotspot in the hunt for habitable zones on Mars. The Martian volcano is about three times…
A Supernova Story
[/caption] SN 2009ab as seen by the AlbaNova Telescope in Stockholm, Sweden. Credit: Magnus Persson, Robert Cumming and Genoveva Micheva/Stockholm…
Circumference of the Earth
The circumference of the Earth in kilometers is 40,075 km, and the circumference of the Earth in miles is 24,901.…