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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.
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.
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.
Why there are seasons and the apparent motion of the stars and sun?
Seasons are caused by the tilt of Earth's axis as it orbits the Sun, which creates variations in temperature and daylight. The apparent motion of the stars and the Sun is due to Earth's rotation on its axis, giving the illusion that these objects move across the sky.
What is an apparent daily motion?
Apparent daily motion refers to the perceived movement of celestial objects, such as the Sun and stars, across the sky over the course of a day due to the Earth's rotation on its axis. This motion gives the illusion that these objects rise in the east and set in the west. While the actual positions of these celestial bodies remain relatively fixed in space, their apparent movement is a result of our perspective from the rotating Earth.
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.
What are three types of actual motion that stars may have?
Proper motion: The apparent movement of a star across the sky due to its actual motion through space. Radial motion: Motion of a star toward or away from an observer, causing a shift in its spectral lines due to the Doppler effect. Orbital motion: Stars in binary or multiple star systems can exhibit motion around a common center of mass due to gravitational interactions.
Do circumpolar stars move counterclockwise around the north celestial pole?
Yes, circumpolar stars appear to move counterclockwise around the north celestial pole due to the rotation of the Earth on its axis. This motion is known as diurnal motion and is responsible for the apparent daily movement of stars in the night sky.
In what direction is the sun's annual motion relative to the fixed stars?
The Sun's annual motion is from west to east relative to the fixed stars due to the Earth's orbit around the Sun. This apparent motion is caused by the Earth's revolution around the Sun, giving the illusion that the Sun is moving against the background of stars in the sky.
Which best describes the intrinsic motion of the stars?
The intrinsic motion of stars refers to their individual motion within a galaxy, which is influenced by factors such as their orbits around the galaxy's center, interactions with other stars, and their velocity relative to us on Earth. This motion is distinct from the apparent motion we observe due to the rotation of the Earth and the motion of the galaxy itself.
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.
How the apparent motion of a object depend on the observer motion?
The apparent motion of an object can vary depending on the motion of the observer. This is due to the concept of relative motion, where the perception of an object's movement is influenced by the observer's own motion. For example, if the observer is moving towards an object, the object may appear to move faster than if the observer is stationary.
Apparent movement of sun?
The apparent movement of the sun is due to the Earth's rotation on its axis, which creates the impression of the sun rising in the east and setting in the west each day. This movement, known as diurnal motion, is a result of the sun's path through the sky as the Earth rotates.
Why do stars appear to move in the sky?
Stars appear to move in the sky due to the rotation of Earth on its axis. As Earth spins, it causes the stars to appear as if they are moving across the sky. This is known as the apparent motion of the stars.
