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The Sun has a period around the galactic center (which is normally taken to be Sgr A*) of T~2.5 x 10^8 years = 250 Myr, meaning it will complete a turn around the galaxy in that time.
The angular speed of the Sun around the gal. center will then be w = 2*pi/T = .025 rad/Myr.
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What are some of Copernicus' discoveries and contributions?
he discovered that the earth revolved around the sun (heliocentricity) and at that time everyone believed that the sun/planets revolved around the earth (geocentricity)
What did Copernicus believe about the earth and the sun?
He believed in a heliocentric universe, or a universe where all of the planets revolve around the sun.
What is heliocentrism?
In Heliocentrism, the Sun (Helios) is said to be at the centre of the universe.
What was Copernicus' new concept of the universe?
That Earth went around the sun.
What is a real life example of a rotation?
Earth going around the sun.
Does angular momentum of a planet depend on its mass and distance from the sun?
The angular momentum of a planet depends on its mass and its distance from the sun. A planet with a larger mass will have a greater angular momentum, while a planet that is farther from the sun will also have a greater angular momentum due to its increased orbital speed.
Do planets revolve around the sun at the same speed?
No, planets do not revolve around the sun at the same speed. Their orbital speeds depend on their distance from the sun - planets closer to the sun have shorter orbital periods and faster speeds, while those further away have longer orbital periods and slower speeds.
What is Earth's angular momentum when it is at perihelion in its orbit?
Earth's angular momentum remains constant throughout its orbit around the Sun due to the conservation of angular momentum. The angular momentum at perihelion (closest point to the Sun) is the same as at any other point in its orbit.
The earths angular momentum when it is nearest to the sun is greater then when it is farthest from the sun?
This statement is incorrect. Earth's angular momentum remains constant throughout its orbit around the Sun. Although Earth moves faster when it is closer to the Sun due to Kepler's second law of planetary motion, this is balanced by its greater distance from the Sun when it is farthest, resulting in a constant angular momentum.
What is Sgr A?
Perhaps you mean Sgr A*, or Sagittarius A* (written with an asterisk at the end), an object believed to be a supermassive black hole, in the center of your Milky Way. It is estimated that this black hole has 4 million times the mass of our Sun.
How do the moons stay in orbit around the sun?
The moons are around planets, planets are around the sun. But basically the orbit is a mix of forward momentum and the the pull towards the sun, this creats an angular movement. when the planet moves forward, this angular movement is now forward momentum and gravity is still pulling it towards the sun creating a angular movement and when added together this is roughly a circle that goes all around the sun.
How much greater is the angular momentum of the Earth orbiting about the sun than the moon orbiting about the Earth?
The angular momentum of the Earth orbiting the sun is significantly greater than that of the moon orbiting the Earth, mainly due to the Earth's larger mass and greater distance from the sun. Additionally, the Earth's faster orbital speed around the sun compared to the moon's speed around Earth also contributes to the difference in angular momentum.
What describes the speed of a planet traveling in an elliptical orbit around the Sun?
A planet's speed in an elliptical orbit around the Sun varies. It moves fastest at the point closest to the Sun (perihelion) and slowest at the point farthest from the Sun (aphelion). This variation is due to conservation of angular momentum in the solar system.
What is the difference between orbital velocity and angular velocity?
Orbital velocity is the velocity at which an object orbits around a larger body, such as a planet or star, while angular velocity is the rate at which an object rotates around its own axis. Orbital velocity is specific to objects in orbit, while angular velocity is a measure of rotational speed.
Which quantity remain constant in planetary motion as seen from sun?
The angular momentum of a planet remains constant in its motion around the sun. This is due to the conservation of angular momentum, which dictates that the product of the planet's mass, velocity, and distance from the sun remains the same as the planet orbits.
When is the speed of a planet revolving around the Sun be the slowest?
The speed of a planet revolving around the Sun is slowest at the aphelion, which is the point in its orbit farthest from the Sun.
What makes the planets to move around the sun?
The planets orbit the Sun because of gravity and their angular momentum, which ultimately derives from the energy of the Big Bang.
