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Why there are seasons and the apparent motion of the stars and sun?
Wiki User
∙ 12y ago
The seasons are due to axial tilts of planets and the apparent motion of stars and sun on the celestial sphere is due to diurnal motion.
Wiki User
∙ 12y ago
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In what direction is the sun's annual motion relative to the fixed stars?
The Sun's apparent motion among the stars is from West to East - just like the motion of the Moon, and the predominant motion of the planets (planets sometimes go from East to West, too - in this case they are said to be retrograde).
When the motion of earth around the sun it mostly affect the?
The motion of Earth around the Sun is the cause of the seasons.
What term do astronomers use for the time it takes for a planet to orbit the sun relative to the stars?
Astronomers use the term "sidereal period" to describe the time it takes for a planet to orbit the sun relative to the stars. Sidereal periods are measured based on the apparent motion of a planet against the background of fixed stars rather than against the sun. This allows for more precise measurements of a planet's orbital period.
Why do some people feel it is inaccurate to say that the Sun rises and sets?
Because the Sun isn't moving around the Earth. The Earth is rotating on its axis.The apparent movement of the Sun across they sky is due to the rotation of the Earth on its axis. This is also true of the apparent motion of the moon and stars.
Why cant you see stars moving?
If you are referring to the observation of absolute stellar motion, we cannot see stellar motion because (1) the distances between stars and galaxies are so great that their relative displacement from one minute/hour/day/year/century to the next is infinitesimally small, and (2) in the Milky Way galaxy, all the stars rotate together, and so our neighboring stars maintain their relative position to the Sun and Earth. . If you are referring to apparent stellar motion due to the rotation of the Earth, this can be observed in the same way as you can chart the progress of the sun and the moon across the sky over the course of minutes or hours.
In what direction is the sun's annual motion relative to the fixed stars?
The Sun's apparent motion among the stars is from West to East - just like the motion of the Moon, and the predominant motion of the planets (planets sometimes go from East to West, too - in this case they are said to be retrograde).
What causes the apparant movement of stars in the sky?
The real motion of stars is hardly noticeable even over a period of many years. It's the Earth's daily rotation the is the main cause of their apparent motion. (Stars are so far away that the Earth's revolution around the Sun hardly cases any apparent motion.)
When does a planet is said to be in retrograde motion?
A planet is said to be in retrograde motion when its apparent motion - the motion as seen by us, against the background stars - is from east to west.Planets spend more time in prograde motion, from west to east. The apparent movement of Sun and Moon against the background stars is also from west to east. Not to be confused with the daily motion, due to Earth's rotation.
In what direction is the apparent daily motion of the sun?
It is westwards.
When the motion of earth around the sun it mostly affect the?
The motion of Earth around the Sun is the cause of the seasons.
What is the line that the sun traces across the celestial sphere?
The "ecliptic". In truth, the Sun doesn't move; the apparent motion of the Sun across the sky is caused by the Earth spinning, and the apparent motion of the Sun across the "celestial sphere" is caused by the Earth orbiting the Sun. But the plane of the Earth's orbit around the Sun is what causes the apparent motion of the Sun across the celestial sphere, so the "ecliptic" is actually the plane of the Earth's orbit.
What is the apparent shift of stars as earth orbits the sun?
parallax :)
The brightest stars have apparent magnitudes that are?
Negative The apparent magnitude of our sun is -26.73 whereas Vega is +0.03
What is the sun's apparent path through the background of stars called?
ecliptic
In witch direction does the sun rises?
The sun rises in the east and sets in the west. This is, of course, apparent motion and not true motion.
Why are some constellations noticeable in movement?
Because the Earth travels around the Sun by about a degree per day, the apparent positions of the stars in the night sky appear to move as well. From the surface of the Earth, we generally cannot see the stars that are on the other side of the Sun from us; they would be lost in the glare of the Sun itself.So each night brings a slight apparent movement of the stars. The stars themselves are all moving, but they are so far away that we cannot notice their motion over such a short period as a human lifetime.
What do we say when the sun goes down over the horizon?
We say that it is 'setting,' but this is apparent motion, and not true motion. The same is true for the rising and setting of the moon and fixed stars. There is another spectacular example of apparent motion that is different from true motion. Because the moon 'rises' in the east and 'sets' in the west, it is easy to think that it is "moving" from east to west. In fact, the moon's orbit around the earth is from west to east. The slow (monthly) orbit of the moon along with the 24-hour rotation of the earth give us the impression of the moon's apparent motion.
