When people talk about astronomy, especially when it comes to aging systems, stars or other concepts that relate with age, the term sidereal year is mentioned. This term is defined in science as the measure of time for a planet, star constellation or celestial body to complete its orbit around the sun, in terms of […]
An Electron is the negatively charged subatomic particle. Electrons can be free, like those travelling in an electric current. They can also be bound to an elemental atom. The symbol generally used for this particle is ?e-.? It is virtually weightless when compared to the protons and neutrons. Studies have shown that its weight is
Do you know that the earth is part of the solar system which is part of the Milky Way galaxy within the Local Group that is in turn one of the components of the Virgo Supercluster? Amazing indeed, as everything in the universe is always a tiny component of a larger association of heavenly bodies,
The Electron Volt (eV) is a unit of measuring energy. Remember that for electrons to move, there must be a potential difference or voltage. The electron volt refers to the gained kinetic energy of a single free electron, as it accelerates in a 1-volt potential difference. One eV is approximately 1.602?10?19 J. For astrophysics, the
Conjunction, when used in positional astronomy and astrology refers to the position of two heavenly bodies in relationship to their distances with one another. When observed from a certain point, such as the Earth, two heavenly bodies seem to be near each other and sometimes their nearness to one another can form patterns. The phenomenon
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An element is a pure substance which is made of one type of atom. The atom is distinguished by its atomic number, which is equivalent to the number of the protons located in its nucleus. Every object?solid, liquid or gas?is made of an element or combination of elements. Examples of them include hydrogen, helium, carbon,
Photo by: Apod.Nasa Creative Commons The Large Magellanic cloud is basically a dwarf galaxy that lies about 150,000 light years away from Earth. It is currently the third closest discovered galaxy from earth right after the Canis Major and Sagittarius Dwarf galaxies.
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The focal point in the sky or the North Celestial Pole is where stars rotate or revolve from the northern hemisphere. It is also the exact point where the star constellation called Polaris or the Northern Star can be seen in full view. Furthermore, this is also the reference point in making sundials in the
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Anything we throw up in the air will fall back to the ground. This is because of the downward pull of gravity, which is causes the downward acceleration of 9.81 meters per second squared. For an object to leave the surface of the earth, without falling back due to gravity, it must possess a speed
Photo by: IntrplnetSarah Creative Commons On earth, there is the process of weathering and erosion, well, the same applies in space, and the effects of these geographic occurrences are far heavier and much more different from what is happening here on earth. Space Weathering is the general or the so-called “blanket” term used for the
