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The rotation of the Earth makes the stars appear to move in the sky.
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∙ 14y ago
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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.
What does inertia do?
Inertia is the resistance of an object to change it state of rest or motion. when you are standing in a moving bus and it suddenly stops you tend to fall backward. This is due to inertia of motion. Body resists the change in motion due to which u fall backward. so inertia exactly opposes or resists your change in motion.
What properties do liquid and gases have due to the movement of their molecules?
Liquids and gases are amorphous (shapeless), viscous (can flow), and diffuse (have internal space) due to the movement of their molecules.
The motion of a 150g ball is more difficult to change than the motion of a 50g ball Why?
Due to the greater mass, the momentum will high, hence making its motion difficult to change.
The brightness of a star as seen from earth?
Absolute magnitude. Two stars of the same absolute magnitude usually do not have the same apparent magnitude because one may be much farther from us than the other. The other that is farther away will appear dimmer. To compare absolute brightness, astronomers determine what magnitude the stars would have if they were at a standard distance of about 32.6 light years. The sun has an apparent magnitude of -26.7, if located at a distance of 32.6 light years, have an absolute magnitude of 5. Stars with absolute magnitude values lower than 5 are brighter than the sun. Because of their distance, however, they appear much dimmer.A lot brighter than you think actually.
Why there are seasons and the apparent motion of the stars and sun?
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.
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.
What happens during the apparent retrogate motion of a planet?
When that happens, the planet moves from east to west, from our point of view. This should not be confused with the daily motion of all stars + planets due to Earth's rotation; rather, to the planet's movement against the background of the stars.
How do scientists know how far away the stars are?
For near-by stars, the parallax method is used - the star changes its apparent position due to Earth's movement around the Sun.
What is the Name given to the movement of particles due to molecular motion?
brownian movement
Is parallax a star?
The parallax refers to the apparent change in the star's position, due to Earth's movement around the Sun. This parallax can be used to measure the distance to nearby stars (the closer the star, the larger will its parallax be).
What is The apparent daily motion of the stars in the sky due to the Earth's?
All the stars appear to go right round the sky every 23 hours and 56 minutes. But other than that, for example if you look every night at exactly midnight, all the stars go right round once a year.
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.
How much apparent deflection will there be for an air-born projectile moving due West or East along any Latitude due to the Coriolis force?
There is no deflection due to the Coriolis force for motion due West or East.
What does it mean when a star has a larger parallax than another star?
It means that its apparent movement - due to Earth's movement around the Sun - is greater, and that therefore the star is closer to us.
Is the Doppler effect the same as a reflected wave?
No. The Doppler effect is an apparent change in frequency, due to movement, away from towards the observer.
How can a stars spectrum be different from another stars spectrum?
The differences in spectrum are mainly due to: * Differences in temperature between the stars * Differences in chemical composition * Differences in relative movement (redshift / blueshift, due to the Doppler effect)
