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Apparition

Astronomy  Apparent Visual Magnitude  Apse

Apparition: An appearance; in astronomy, the period of observation of a returning periodic comet.


. The period or time when an object is visible and well placed for observation.
Appulse. The apparent close approach of two celestial bodies as seen from Earth, such as a star and a planet, or two planets for example.

Apparition
The period during which a celestial body is visible.
Appleton Layer ...

Let the Begin
We begin early in the when the apparent diameter of Mars is a tiny 3 or 4 seconds of arc and practice each morning until we have identified all the Martian features we have learned over the years.

Single-apparition
Parabolic and hyperbolic orbits (not bound).
Periodic comets Those with short orbit durations Nucleus ...

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motion undergoes seasonal variation because of the obliquity of the ecliptic and because of the eccentricity of the Earth's orbit. Additional small variations result from irregularities in the rotation of the Earth on its axis. [S92]
Apparition ...

It can also change from to (for periodic comets). absolute manometer (NASA SP-7, 1965) 1.

Over the period 1819-1821 the German mathematician and physicist Johann Franz Encke computed orbits for a series of cometary apparitions observed in 1786, 1795, 1805, and 1818, concluded that they were same comet, ...

In 1705, Edmond Halley applied Newton's method to twenty-three cometary s that had occurred between 1337 and 1698.

long-period comets and one-apparition periodic comets receive only a provisional designation -- there is no equivalent of the Roman numeral designation.

' Spectrum used to mean 'phantom' or '', but Isaac Newton introduced a new meaning in 1671, when he reported his experiment of decomposing the white sunlight into colors using a prism.

It is now understood that a spectacular supernova explosion - the detonation of a massive star whose remains are now visible as the Crab Nebula- was responsible for the apparition.

Jupiter and Mars, which had a lovely in the western sky at twilight over the past few months, have swung around the Sun to appear in the east-northeastern morning sky about an hour before sunrise.

The highlight of ISON's apparition will certainly occur in mid-December. The comet will then be visible at both dawn and dusk, a third of the way up from the eastern horizon just before sunrise and low in the west soon after sunset.

is a Sanskrit term meaning "sight" , vision, , or glimpse. It is most commonly used for "visions of the divine," i.e. of a god or a very holy person or artifact....
(holy view) of the deities as they pass.

One of the more spectacular changes recorded for Halley during an apparition was the detachment event that occurred on April 12, 1986. This 3 minute exposure was taken using the Michigan Schmidt telescope at Cerro Tololo Interamerican Observatory.

These s were separated by 75 year intervals so on this basis, Halley predicted that the comet would return in 1758.

4. Try to spot Mercury in morning or evening twilight. (Hint: As seen from the Northern Hemisphere, the best evening apparitions of the planet take place in the spring, and the best morning apparitions take place in the fall.) ...

Low on their horizon, in spring skies, there appeared the of a great ship. This ship sailed ever westward skimming along the southern horizon.

NASA's Hubble Space Telescope has caught a glimpse of a colorful cosmic ghost, the glowing remains of a dying star called NGC 6369. The glowing apparition is known to amateur astronomers as the "Little Ghost Nebula," because it appears as a small, ...

Being a New Yorker, I've become quite used to these s.
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The apparent motions of the Sun and planets were superimposed on this sphere, with the Sun's daily and yearly motions, and the moon's monthly apparitions having special importance.

Sometimes there's a temptation to show people more typical objects -- ghostly, barely visible s with obscure catalog numbers -- "to give them an idea of real astronomy.

Good Mercury watching begins this Saturday evening, June 3, when a slender crescent Moon and the elusive planet appear together for stargazers just after sunset. Mercury's apparition as an evening star will continue through mid-June.

It's possible to see Mercury lurking close to the horizon with the eyes alone, but binoculars help out immeasurably to highlight its waning luster in the ever-brightening twilight. Keep in mind that the disappears as quickly as an early ...

See also: See also: Astro, Planet, Earth, Solar, Sun

Astronomy  Apparent Visual Magnitude  Apse

 
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