'Earth' Category Archives


Published by . Filed under Asteroid, Earth, Moon, Planets, Scientific Terms. Total of 1 comment in the discussion.

A regolith is a collective term referring to the blanket of powdery materials that cover the surface of several celestial bodies such as the earth, moon, and asteroids among many others. This blanket has a powdery appearance and texture because it is composed of fine debris such as soil, shattered rock, dust, and other small […]


Prime Meridian

Published by . Filed under Earth, Measurements, Scientific Terms. Total of no comments in the discussion.

The prime meridian is considered as the middle point of earth. It is also commonly known as the Greenwich Meridian and is a component that forms the International Date Line, which then divides the Western and Eastern Hemispheres of the Earth.



Published by . Filed under Atmosphere, Earth, Scientific Terms. Total of 1 comment in the discussion.

The plasmasphere is that region of dense, cold plasma surrounding the Earth. It is a part of the plasma-containing magnetosphere and is located just outside the upper ionosphere, extending to about 8000 to 25,000 miles into space. This donut-shaped volt of energy around our planet is the result of a process jumpstarted by the Sun’s […]



Published by . Filed under Distance, Earth, Measurements, Moon, Physics, Scientific Terms, Space Tools, Stars, Sun. Total of 1 comment in the discussion.

The Sun, Moon, stars and other celestial objects are beyond the reach of any instrument that can be used by observers here on Earth. Measuring the distance of a celestial object from the Earth might seem to be complicated. But measuring the distance of these remote entities have been simplified by the concept of parallax.



Published by . Filed under Earth, Phenomena, Physics, Planets, Rotation, Scientific Terms, Space Tools, Stars. Total of no comments in the discussion.

There are many terms in astronomy, and there is no doubt about that. One of which is the concept of Obliquity, more commonly known as the axial tilt. The angle between a certain rotational axis of an object and the specific perpendicular line in regards to the object’s orbital plane is better known as its […]


Extraterrestrial Life

Published by . Filed under Earth, Extraterrestrial, Mars, Space Theory. Total of 11 comments in the discussion.

All of us may have considered what if we aren?t the only intelligent form of life in the universe. What if, light years away, are living beings who think and act like us? Or maybe beings with way, way advanced technology, and are studying us from afar? Some people doubt the existence of extraterrestrial life, […]


Tidal Force

Published by . Filed under Earth, Gravity, Moon, Physics, Planets. Total of no comments in the discussion.

Tidal force is a secondary effect of gravitational force and its most common manifestation, at least on the planet Earth, are tides. Tidal force, by technical definition is the differential force of gravity which arises because the force exerted on one body by another is not constant across the diameter in that the side which […]



Published by . Filed under Earth, Elements, Physics, Planets, Space Tools. Total of 1 comment in the discussion.

Photo by: RJHall Creative Commons Volatiles are chemical elements and compounds that have small boiling points and are found or connected to the atmosphere and crust of both a moon and a planet. Elements such as hydrogen, nitrogen, carbon dioxide, ammonia, and methane are types of volatiles. Water is also a perfect example as well […]


Terrestrial Planet

Published by . Filed under Earth, Mars, Mercury, Planets, Venus. Total of 13 comments in the discussion.

A terrestrial planet is a planet which has solid surfaces and is primarily composed of silicate racks and/or metals. There are 4 known terrestrial planets in our solar system – Mercury, Venus, Earth and Mars, which are all inner planets and one terrestrial dwarf planet, Ceres, located in the asteroid belt. These planets share similar […]