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Because you're standing on the earth, and the earth is turning. As it turns, the
direction that your eyes are pointing keeps turning ... pointing at different stars
as time goes on. Since you don't feel the earth turning, and your body feels like
it's standing perfectly still, your brain has only one other way to understand why
your eyes keep pointing at different stars ... the whole sky must be turning!
What else can I help you with?
When esimating the distance of the stars from earth astronomers use the fact that nearby stars shift in position as observed from earth which is called?
Nearby stars appear to change their position against the distant background in an annual cycle, because of the Earth's changing position 'across' its orbit. This apparent shift is called the star's "parallax".
Explain two ways in which a star's real motion through space translates into motion that is observable from earth?
Parallax effect: As a star moves through space, its position relative to background stars changes, causing it to appear to shift its position slightly when viewed from Earth. This apparent shift, known as parallax, can be used to measure the distance to the star. Doppler effect: The motion of a star towards or away from Earth causes a change in the wavelengths of the light it emits, known as Doppler shift. This shift can be observed in the star's spectrum, allowing astronomers to determine the star's radial velocity and direction of motion.
A red Doppler shift indicates that a star is moving .?
A red Doppler shift indicates that a star is moving away from the observer. This phenomenon occurs because the wavelengths of light emitted by the star are stretched as it recedes, making them appear redder. In contrast, a blue Doppler shift would indicate that the star is moving toward the observer. This shift is a critical tool in astrophysics for determining the motion of celestial objects.
What is higher for closer stars A absolute magnitude B red shift C parallax D blue shift?
The answer would be C) Parallax.The Absolute Magnitude of a star is the star's actual brightness, and is therefore not dependent upon the position of the observer.Red Shift and Blue Shift are consequences of a stars speed relative to the observer. Again this is independent of the stars proximity to the observer.Parallax, is the apparent change in position based upon the motion of the observer, and is directly proportional to the proximity of the object. Just as, when driving on the road distant trees or buildings don't appear to zoom past you as quickly as a pedestrian on the side of the road, so it is with stars. The closer they are the larger the parallax is as the Earth orbits the Sun, for example.
How does the Doppler shift change the appearance of stars that are moving toward Earth?
As stars move toward Earth, their light waves are compressed, resulting in a phenomenon known as blueshift. This causes the light emitted by the star to shift toward the blue end of the spectrum, making the star appear bluer than it actually is. Conversely, if a star is moving away, it would exhibit redshift, appearing redder. The amount of shift can provide astronomers with information about the star's velocity and distance.
Why does a star appear to shift position when viewed from different locations?
A star appears to shift position when viewed from different locations due to a phenomenon called parallax. As the observer moves between two points in their orbit around the Sun, nearby stars appear to shift against the more distant background stars. This apparent change in position is a result of the observer's changing viewpoint, allowing for the measurement of the star's distance from Earth. The effect is more pronounced for closer stars and diminishes for those that are farther away.
Which observation of a star indicates it is relatively close to Earth-?
The star's position appears to shift slightly in the night sky during the year.
What is paralax?
An apparent change in position of a star due to the movement of the Earth in it's orbit. The closer the star is there is a larger shift and the further the star is there is a smaller shift.
When esimating the distance of the stars from earth astronomers use the fact that nearby stars shift in position as observed from earth which is called?
Nearby stars appear to change their position against the distant background in an annual cycle, because of the Earth's changing position 'across' its orbit. This apparent shift is called the star's "parallax".
Explain two ways in which a star's real motion through space translates into motion that is observable from earth?
Parallax effect: As a star moves through space, its position relative to background stars changes, causing it to appear to shift its position slightly when viewed from Earth. This apparent shift, known as parallax, can be used to measure the distance to the star. Doppler effect: The motion of a star towards or away from Earth causes a change in the wavelengths of the light it emits, known as Doppler shift. This shift can be observed in the star's spectrum, allowing astronomers to determine the star's radial velocity and direction of motion.
If a star appears at position 1 during the summer during what season will it appear at position 2?
No, I think
Why pole star looks stationary while all other stars appear to move?
As the Earth spins on it axis, the stars appear to move across the sky as we see them from the Earths surface. The pole star does not shift much from its position throughout the night though. This is because the axis about which the Earth is turning is pointing in its direction, towards the north (and out towards the south too).
A red Doppler shift indicates that a star is moving .?
A red Doppler shift indicates that a star is moving away from the observer. This phenomenon occurs because the wavelengths of light emitted by the star are stretched as it recedes, making them appear redder. In contrast, a blue Doppler shift would indicate that the star is moving toward the observer. This shift is a critical tool in astrophysics for determining the motion of celestial objects.
Why do stars appear to shift position as you observe them one month and then again on the same date the next month?
the earth is rotating and revolving, so they are appear in different places
What is the name for the change in a stars spectrum when it moves away from the earth?
The change in a star's spectrum when it moves away from the Earth is called redshift. This shift occurs because the wavelengths of light emitted by the star are stretched out as the star moves away, causing the light to appear more red.
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 is higher for closer stars A absolute magnitude B red shift C parallax D blue shift?
The answer would be C) Parallax.The Absolute Magnitude of a star is the star's actual brightness, and is therefore not dependent upon the position of the observer.Red Shift and Blue Shift are consequences of a stars speed relative to the observer. Again this is independent of the stars proximity to the observer.Parallax, is the apparent change in position based upon the motion of the observer, and is directly proportional to the proximity of the object. Just as, when driving on the road distant trees or buildings don't appear to zoom past you as quickly as a pedestrian on the side of the road, so it is with stars. The closer they are the larger the parallax is as the Earth orbits the Sun, for example.
