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Pamela McGlynn
Wiki User
∙ 8y agoThe apparent magnitude of a star, or how bright it seems to an observer, depends mostly on both its absolute magnitude or true energy output, and its distance from the observer. Since the apparent brightness varies with the inverse square of its distance this makes determination of its distance an important consideration. This can be established using parallax, periodic variations in its brightness, statistical modeling, and other techniques.
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What type of motion does a bird flying in the sky have?
random motion
What are the examples of non - periodic motion?
the answer is when an object moves repeatedly but randomly and without periodicity than its motion is said to be an non periodic motion
What is the effect of buoyancy to the object?
The effect of buoyancy is to reduce the apparent weight of the object when it's introduced into a fluid. Depending on the density of the object compared to the density of the fluid, the object's apparent weight could be reduced to zero (beach ball floating in the pool), or even to a negative value (helium party balloon heading for the sky).
Why does the size and direction of a shadow change?
Because the sun moves through the sky, or at least it appears to do that. Since the sun's position changes with respect to objects on the earth so do their shadows.
What force oposes motion?
That depends on the type and direction of motion to which you are referring. Friction would be a good example of an opposing force to forward motion along a surface, such as kicking a ball along grass or pushing a toy car along concrete or carpet. Drag or air resistance acts to resist the motion of an object through a gas, It is relatively unusual in that it depends strongly on the velocity of the object in question. For example, a sky diver will fall and accelerate towars the surface of the earth due to the force of gravity. As his velocity increases, so to will the drag force. At some velocity this drag force opposing motion will equal the gravitational force causing motion. This means that the net force acting on the skydiver will be zero and they will no longer continue to accelerate. The velocity at which drag force equals the force due to gravaty is known as terminal velocity. Gravity is a good example of an opposing force to upward motion, such as throwing a ball into the air.
What causes the apparent movement of objects across the sky during day or night on earth?
The rotation of the earth is what gives motion to the heavens.
On the night when you were watching the Moon at sunset and then at 1000 its overall motion in the sky during that time was?
The Moon's overall motion (apparent motion) in the sky was from East to West.
The apparent motion of stars is due to movement of?
The rotation of the Earth makes the stars appear to move in the sky.
What does the length of shadows made by the Sun throughout the day tell you about the Suns apparent motion across the sky?
If the shadows are longer, that means the Sun is lower in the sky.
In which direction does the northern sky seem to turn?
The apparent motion is anti-clockwise..because the Earth is turning the other way........
Do the stars move across the sky?
Yes, stars do move around in the sky, but their apparent motion is very small, such that it would require centuries to note significant change in their positions.
Star which do not change its position in the night sky?
The only star that does not appear to move in the Sky is Polaris, the North Star. (Actually it does move in a TINY circle, but the apparent motion is too small to notice.)
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.)
How much does a star in the sky move in 8 weeks?
Not at all. When compared to the other stars, there is NO star that shows any apparent motion in as little a time as 8 weeks. The star with the fastest "apparent motion" is Bernard's Star, sometimes called the "runaway star". If you could memorize the night sky when you were young, and compare it to the sky when you are dying of old age, you MIGHT be able to notice this one star having moved, just a little.
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.
Major advantage of Copernicus' Sun-centered model over the Ptolemaic model?
It offered more natural explanation for the apparent retrograde motion of planets in our sky.
What will happen if the sun stands still?
A:To the ancients, it seemed easy for supernatural powers to make the sun stand still for a few hours, with no adverse outcome. However the apparent motion of the sun across our sky does not mean the sun is actually moving relative to us. This apparent motion is caused by the rotation of the earth, which can not be stopped.
