'Measurements' Category Archives

Lunar Month

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

The Sun and the Moon are two of the most observed celestial bodies. These celestial bodies that are seen at day and night time are often the basis for determining time. The Moon has been observed over time and its phases and eclipses have been the source of many superstitions and time calculations. A lunar […]

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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.

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Planck Scale

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

When you hear of the planck scale, you’ll have to think small and hot but no, I wasn’t referring to red and green jalapeño peppers. I am, in fact, talking about this theory in physics that is the subject of much debate among physicists both young and old.

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Position Angle

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The position angle refers to the relative measurement of the secondary object from the primary one on the same celestial sphere, often used to measure and observe binary or double stars. The position angle is measured in degrees in a counter clockwise direction starting from the north celestial pole. It is usually abbreviated to PA.

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Parallax

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.

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Light Year

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

Stars and celestial objects are far from the Earth. Unlike travelling by land which can be easily approximated by measuring distances in kilometers or miles, celestial objects cover a great distance away from the Earth. Another unit of measurement is used to quantify this huge distance which cannot be simply represented by the use of […]

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Light Gathering Power

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

Light-gathering power is a way to measure the performance and effectiveness of a telescope that is proportionate to the square root of the size of the aperture. For instance, a telescope that possesses more than two times its diameter has the potential to collect about four times as many light.

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North Celestial Pole

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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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Limiting Magnitude

Published by . Filed under Atmosphere, Measurements, Phenomena, Physics, Scientific Terms, Space Tools. Total of no comments in the discussion.

We view celestial objects from a distance and use their brightness to make observations. Amateur astronomers and scientists often make use of a celestial object’s limiting magnitude, which is a measure of the lowest or faintest apparent magnitude that can be seen using a particular instrument. In simple terms, limiting magnitude is often considered as […]

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