Objective Lens
A simple refracting telescope may be constructed from a pair of convex lenses, where the larger of the two lenses is the objective. This lens produces a real image at the focal plane that is viewed with an eyepiece.
Objective prism spectroscopy is a type of astronomical spectroscopy, used for simultaneously measuring the spectra of many bright objects within the field of view of the telescope.
Objectives: Upon completion of this chapter, you will be able to cite examples of completion of a mission's primary objectives and obtaining additional science data after their completion.
Objective
(a) The lens or combination of lenses nearest the object in an optical instrument. The nearest lens to the object in a compound objective is often called the object lens.
Objective
In this activity, students will observe that the faintest stars which they can see in the sky are affected by many things: the adaptation of their eyes to the dark, the presence of clouds or haze, the time of year, ...
Objectives
There are 11 scientific instruments on board Ulysses, investigating phenomena ranging from the solar wind to cosmic dust and gamma-ray bursts.
objective
a telescope's primary lens or mirror that gathers light and brings it to a focus
obliquity ...
Objective and subjective
Assessment (either summative or formative) is often categorized as either objective or subjective. Objective assessment is a form of questioning which has a single correct answer.
Objective lens This is the large lens at the front of the telescope. It is invariably either achromatic or apochromatic. Simple lenses are never used nowadays as the objective lenses of telescopes. It is often called 'the OG' (objective glass).
Objective
This is the thing that gathers light from the sky and folds the light into a cone. In a refractor it is the big lens that points at the sky, in a reflector it is the big mirror at the bottom of the tube.
Objective Lens (or Object Glass) The lens in a refractor that is closest to the object under observation.
Obliquity of the Ecliptic The angle between the plane of the ecliptic and that of the celestial equator.
Objective- the main light gathering optical element in a telescope; it may be a lens or a mirror
Oblateness- the degree of flattening at the poles of a celestial body ...
Objective Lens
In a refracting telescope, the long focal length lens that forms an image of the object viewed; the lens closest to the object
Objective Mirror ...
objective lens, mirror: The main optical element in an astronomical telescope. The large lens at the top of the telescope or large mirror at the bottom.
oblateness: The flattening of a spherical body; usually caused by rotation.
Objective - The main lens or mirror of a telescope
Oblateness - A departure from spherical shape of a body in which the body's polar diameter is smaller than its equatorial diameter ...
Objectives:
Identify the Sun as the source of Earth's light.
Observe and describe changes in the Sun's altitude and position.
Recognize that day and night are determined by our view of the Sun.
Thick objective lens started to dew over, eventually (it was a really humid and cold night).
4 inches were a bit short on aperture for some objects.
Finding targets was easy by sighting along the tube (no finder).
Objectives:
Using the "Hidden Lives of Galaxies" poster, the student will gain knowledge of galaxy morphology. Student will observe different images of galaxies from the Hubble Space Telescope deep survey image.
OBJECTIVE
The objective is the light-gathering lens (or mirror) of a .
OBLATE
An oblate sphere is one that is flattened at its poles. is the most oblate planet in our ; the difference in its equatorial and polar diameters is almost 10%.
Objectives and constraints of the system and its users can be represented as functions of the output variables or state variables. The objective functions will depend on the perspective of the model's user.
Objective:
The light-collecting element of a telescop.
Oblateness:
The depature of a planet from spherical form because of the centrifugal force of the rotation.
Objectives
The 55-kilogram (121-pound) payload includes:
two magnetometers;
two solar wind plasma instruments;
a unified radio/plasma wave instrument;
three energetic-charged particle instruments;
an interstellar neutral gas sensor; ...
objective: a telescope's main light-gathering lens or mirror.
occultation: when the Moon or a planet passes directly in front of a more distant planet or star.
Objectives ResolutionObjectivism, Ayn Rand, and homosexualityObjectivism
Objectivism: The Philosophy of Ayn RandObjectivism (Ayn Rand)Objectivist epistemology
Objectivist ethicsObjectivist metaphysicsObjectivist movement ...
objective - The main lens or mirror of a telescope. The larger it is, the brighter the image is and the sharper it is (i.e., its resolution is better).
opacity - Absorbing power; capacity to impede the passage of light.
objective - (n.)
The principal lens or mirror of an optical system.
oblate - (n.) ...
The objective for Gemini 8 was to dock with an unmanned Agena spacecraft that had been put into orbit hours earlier. The mission was piloted by Neil Armstrong and Dave Scott and it would nearly cost them their lives.
The objective is in effect to compress a file, and then decompress it exactly as it was before. The compression algorithm will get a text file and will compress it without concern for whether it contains readable text or sheer gibberish.
Modern objective lenses are actually made of several lenses of different refractive indexes fitted tightly together in order to compensate each other's chromatic aberration and thus produce an image that has all the colors focused to the same point.
Science objectives. The major interplanetary exploration mission to Neptune would have several science goals:
Add to human knowledge of giant icy gas planets in general, both inside and outside our Solar System.
The prime objective of ISRO is to develop space technology and its application to various national tasks.[7] The Indian space program was driven by the vision of Dr Vikram Sarabhai, considered as the father of Indian Space Programme.
Empiricism: objective observational experiences are necessary
Scientific method combines rationalism's deductive logic with empiricist's inductive logic based on observational experience
Next ...
NASA's mission objective of space exploration inspired me to choose my career.
What do you think will be the most important things you'll take away from your involvement with NASA?
The scientific objectives include atmospheric entry science, long-range and close-up surface imaging, with the general objective being to characterize the Martian environment for further exploration.
All four science objectives were achieved in the flyby, which saw the spacecraft swoop to within 178 kilometres of the comet's nucleus at closest approach.
The diameter of the objective is referred to as the aperture; it typically ranges from a few centimeters for small spotting telescopes up to one meter for the largest refractor in existence.
The diameter of the objective of a telescope or other optical instrument, usually expressed in inches, but sometimes as the angle between lines from the principal focus to opposite ends of diameter of the objective.
3.
The materials for it were rapidly accumulated by the use of an objective prism, that is, of a prism placed in front of, instead of behind the object-lens, by which means the spectra of all the stars in the field, to the number often of many score, ...
In 1973 and 1974, the two spacecraft Pioneer 10 and 11 encountered Jupiter, their nominal objective. Pioneer 10 then proceeded on an orbit into interstellar space.
For astronomy, one of the most important factors to look for is the size of the objective (main) lens. Just as you can run more water through a larger pipe, you can get more light in through a larger lens.
The human free-will as a subjective principle has for its objective correlate the notion of possibility, by which one of two alternatives may occur.
In the refracting telescope, or refractor, light is bent, or refracted, as it passes through an objective lens. The objective lens is convex, i.e., thicker at the middle than the edges.
The most common type of refracting telescope arrangement, consisting of converging objective and eyepiece. Unlike the Galilean telescope, it provides an inverted image and has a greater length.
Most prominent are those for color and objective-prism selection. Below redshifts of 0.4 or so, QSOs almost uniformly appear much bluer than faint high-latitude stars. At z~0.
As the closest neighbor of the earth, the moon has been the objective of many space missions. In 1958 the first attempts by the U.S. and the USSR at lunar probes failed. The Russian Luna 2, launched Sept. 12, 1959, hit the moon 36 hr later.
When a large proportion of these mirrors tilt in the same direction at the same moment across the entire objective diameter, the image at the focus is displaced to one side ("tilt"), ...
The quality of an ocular, or eyepiece, is just as important to the telescope's optical system as the primary mirror or objective lens. Good contrast images can only be obtained with high quality multi-coated oculars.
The second number represents the aperture size, or diameter of the objective (front) lenses in millimeters. When selecting binoculars for astronomical viewing, larger apertures are always better.
The first six attempts in the Ranger series, between 1961 and 1964, failed to accomplish their objective of just hitting the Moon. The last three were successful, however. Ranger 7 collided with the lunar surface (as intended) on June 28, 1964.
Primary scientific objectives were to return data on the bulk properties, composition, mineralogy, morphology, internal mass distribution, and magnetic field of 433 Eros as the spacecraft orbited the asteroid from February 14, 2000 to February 12, ...
The diameter of the main mirror in a reflecting telescope, the objective lens in a refracting telescope, or the dish of a radio telescope.
Vyssotsky (1888-1973) around 1942 using Leander McCormick Observatory objective prism plates (Alexander N. Vyssotsky, 1943).
The achromatic lens, which greatly reduced color aberrations in objective lenses and allowed for shorter and more functional telescopes, first appeared in a 1733 telescope made by Chester Moore Hall, who did not publicize it.
In fact, the first systematic study of stellar spectrum was done by putting a prism at the front end of the telescope (the "Objective Prism Technique").
Many factors influence the dimmest magnitude visible through binoculars, factors such as the amount of light pollution, the presence of the moon, the age of the observer, the size of one's binocular objectives, etc.
Refractors gather light with an objective lens at one end and focus the light at the eyepiece at the other end.
The Mars Global Surveyor mission was designed as a rapid, low-cost recovery of the Mars Observer mission objectives.
One of Galileo's telescopes. The focal length is 1330 mm with a 26 mm aperture, it magnifies 14x. It has an objective bi-convex lens and a plano-concave eyepiece.
Galileo's Observations ...
The ability of a telescope to collect light. Proportional to the area of the telescope's objective lense or mirror.
light pollution ...
Quantitative Analysis - Evaluation based on objective, measurable quantities.
 See also: Time, Earth, Second, Light, Field
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