Using the seismic data, the scientists had first postulated the existence of a fluid core. In 1915, Gutenberg published a measurement of the core’s radius. In 1936, Danish...
The mantle is a highly viscous layer between the crust and the outer core. The boundary between crust and mantle is called Mohorovičić discontinuity after the name of...
Earth’s crust is the outermost layer composed of various types of rocks. The boundary between the crust and mantle is generally called the Mohorovičić discontinuity. Thickness of Continental...
Cosmic rays are invisible, high-energy particles that constantly bombard Earth from all directions. Most cosmic rays are protons moving at extremely high speeds, but they can be atomic...
Comets are basically “snowy dirtballs” or “dirty snowballs”—collections of rocky material, dust, and frozen water, methane, and ammonia that move through the solar system in long, highly elliptical...
Asteroids are relatively small, primarily rocky or metallic chunks of matter that orbit the Sun. They are like planets, but much smaller; the largest asteroid, Ceres, is only about...
Kuiper Belt or the Kuiper-Edgeworth Belt is a doughnut-shaped region that extends between about three to eight billion miles (5 to 12 billion kilometers) out from the Sun...
Neptune is the eighth major planet in our solar system, 17 times more massive than Earth and about four times its diameter. The most remote of the four...
