History and Etymology for zenith Middle English cenyth, senyth , from Middle French cenit , from Medieval Latin, from Old Spanish zenit , modification of Arabic samt al-ra's way over one's head. Learn More About zenith. Time Traveler for zenith The first known use of zenith was in the 14th century See more words from the same century. Listen to Our Podcast About zenith. Get Word of the Day delivered to your inbox!
Sign Up. Style: MLA. Kids Definition of zenith. Get Word of the Day daily email! Test Your Vocabulary. Can you spell these 10 commonly misspelled words? Filters 0. The definition of a zenith is the highest point or peak. An example of a zenith is the highest point in the sky. The highest point above the observer's horizon attained by a celestial body.
The point directly overhead in the sky or on the celestial sphere. The highest point; peak. The discourse and discord came to its zenith with the war. Three decades on from its creative zenith , so-called 'progressive' rock remains probably the most critically maligned and misunderstood genre in the history of rock music.
The sun was then truly at its zenith. This underlying sense of unease, then, finally reached its zenith towards the end of the courses.
The process of extending social insurance coverage reached its zenith in the early s, when roughly 70 per cent of the labour force was protected. This meeting indicates that sealing had already reached its zenith. It can be seen that the zenith of production was the period from to The rooflights exploit the fact that an overcast sky is three times as bright at the zenith as at the horizon, enabling less glazing for the same amount of light.
The concept of the suburban life-cycle was implied by the work of the factorial ecologists in the s and s, when the quantitative revolution in geography reached its zenith. Older respondents commented on a past zenith. The curves rise to attain maximum values at intermediate zenith angles and then decline as light is attenuated along increasingly lengthy light paths through the canopy.
Hemispheric concordance was at its zenith. The boxer starts off, he soon reaches his zenith and then starts to go downhill. From the Hansard archive. Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3. In the same manner, shorter the wavelength, higher will be the frequency. It also refers to the state in which the net or an apparent effect of gravity i. Description: The condition of apparent weightlessness occurs when a body in a gravitational field changes places to neutralize its gravitational force.
For example, astronauts are seen floating around in the outer space because of this phenomenon. Astronauts orbiting the Earth in a space station experience zero gravity or weightlessness because their spacecraft continuously undergoes changes in velocity in its orbit in order to prevent it from being pulled into the atmosphere. This acceleration, which is often known as a centrifugal force, counterbalances gravity. Hence, they experience Zero Gravity or weightlessness. Sir Isaac Newton, an English mathematician and physicist, discovered gravity.
To help explain this concept better, we can take an example of a block of lead in free fall on planet x. The block is said to be in a state of weightlessness even though it is being pulled down by the planet's gravity.
Satellites, projectiles, galaxies, planets etc. Not having to bear weight on your feet appears relaxing but in the long term, you could face many health problems like the weakening of bones and muscles. Other changes also take place, which have been identified by numerous studies. The most common problem faced by humans in the initial hours of weightlessness is known as SAS Space Adaptation Syndrome like vomiting, nausea etc. Definition: Zenith is the imaginary point that is directly above a particular location on the celestial sphere.
It is vertically opposite to the apparent gravitational force i. It is the highest point on the sphere and thus, the farthest up from the gravitational force.
Description: The term zenith is derived from an Arabic expression meaning direction of the head or path above the head. Zenith is sometimes also used to refer to the highest point that a celestial body reaches during its orbit at a given point of observation. The opposite of zenith, that is the direction of the gravitational pull, is called the Nadir, at degrees.
Zenith, in astronomy terms, is the point in the sky directly overhead. The angular distance from the zenith to any celestial body, in space, is called the zenith distance.
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