The rising and setting points of celestial bodies (sun, moon, stars, and planets) are determined by their positions on the celestial sphere.
The celestial sphere is an imaginary sphere with the earth at its center. The sky overhead is the half of the sphere we see from earth, appearing as a dome (even though the sky extends infinitely into space). The other half of the sphere is below the circle of the horizon.
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The correct answer is (D).
Space photography help astronomers:To visualize and observe the position and appearance of celestial objects like: path of orbiting planets ,dim stars which invisible to naked eyes ,far away galaxies etc.To observe any phenomena which is occurring at macro level for example: collision of steroids and meteors etc.
(D) the spot could have been caused by an object that emitted a flash that lasted for only a fraction of the time that the camera shutter was open
(A) the spot was not the brightest object in the photograph: The effect described and the brightness of the objects have no relation. Stars of very different brightness will be shown.
(B) the photograph contains many streaks that astronomers can identify as caused by noncelestial objects: Yes, but that doesn't explain the effect described. A plane could leave a streak.
(C) stars in the night sky do not appear to shift position relative to each other: True, at least for relative short times, but that has nothing to do with the effect described, which happens in a very short period of time.
(E) if the camera shutter had not been open for an extended period, it would have recorded substantially fewer celestial objects: True, but quantity of objects does not relate with the particular case described.
(D) the spot could have been caused by an object that emitted a flash that lasted for only a fraction of the time that the camera shutter was open: True, this can happen, for example, with Iridium satellites, they emit a flash (reflect solar light) that lasts a very short time as seen from one point on the surface (the place where the camera is), and something like this could have been captured by the camera shutter, appearing like a point compared to the streaks left by the stars.
Aristotle's geocentric theory failed to match the expected predictions because a few celestial objects appear to have retrograde motion.
Aristotle’s theory states that all the bodies in universe rotate around the earth, and earth is located at the centre. But, the most serious challenge it was given was that, the difference found in the paths of revolution of mercury and Venus. They are revolving around the sun, and not the earth, periodically.
This is the significant drawback, and major factor for the Copernicus and the other models to be achieved. The mercury and Venus, closest planets to earth, and the sun too, are not following the earth’s path. And hence, upon studying clearly, all celestial bodies do not follow a path round the earth, but around a fireball, that is sun.
I think the answer is B?
The correct answer is 88 different areas that identify, name, and plot the celestial objects.
The constellation map differentiates the celestial sphere into 88 constituents called constellations, assisting the astronomers to find out the deep sky objects and the stars.
The constellations, which can be witnessed in the sky at night relies upon the location of the observer and the season, and they fluctuate all through the year. Of the 88 recognized constellations by the IAU (International Astronomical Union), 36 are witnessed exclusively on the northern sky, and the left 52 are situated in the southern sky.
Your answers are :AxisCyclic patternSeasonsSolar system EclipsesDifferential
i beleive the answer is c