Orbital Speed
What factors affect orbit?
- Gravity. Gravity is the primary force that controls the orbit of the planets around the sun. …
- Inertia. …
- Gravity Working with Inertia. …
- Velocity and Gravity.
What determines the size and shape of an orbit?
| Eccentricity Type of Orbit | 0 < e < 1 Elliptical | e = 1 Parabolic | e > 1 Hyperbolic |
|---|
What are the six Keplerian elements?
- a = Semi-major axis = size.
- e = Eccentricity = shape.
- i = inclination = tilt.
- ω = argument of perigee = twist.
- Ω = longitude of the ascending node = pin.
- v = mean anomaly = angle now.
What is Kepler’s third law formula?
Kepler’s third law states that the square of the period is proportional to the cube of the semi-major axis of the orbit. … Equation 13.8 gives us the period of a circular orbit of radius r about Earth:
T = 2 π r 3 G M E . T = 2 π r 3 G M E .
What keeps a planet in orbit?
Gravity
is the force that keeps planets in orbit around the Sun. Gravity alone holds us to Earth’s surface. … A planet’s size and mass determines its gravitational pull. A planet’s mass and size determines how strong its gravitational pull is.
What planet has 16 hours in a day?
| Planet Day Length | Jupiter 10 hours | Saturn 11 hours | Uranus 17 hours | Neptune 16 hours |
|---|
What is Kepler’s 3rd law called?
Kepler’s third law – sometimes referred to as
the law of harmonies
– compares the orbital period and radius of orbit of a planet to those of other planets.
What is a Subsatellite point?
Sub satellite Point is
the point at which a line between the satellite and the center of the Earth
.
intersects the Earth’s surface
.
What is a Keplerian element?
Keplerian elements (aka Satellite Orbital Elements)
The set of six independent constants which define an orbit – named for Johannes
Kepler [1571-1630]. The constants define the shape of an ellipse or hyperbola, orient it around its central body, and define the position of a satellite on the orbit.
How many Keplerian elements are there?
The
Seven (or Eight)
Keplerian Elements. Seven numbers are required to define a satellite orbit. This set of seven numbers is called the satellite orbital elements, or sometimes “Keplerian” elements (after Johann Kepler [1571-1630]), or just elements.
What does P 2 a 3 stand for?
Kepler’s 3
rd
Law: P
2
= a.
3
It means
that if you know the period of a planet’s orbit
(P = how long it takes the planet to go around the Sun), then you can determine that planet’s distance from the Sun (a = the semimajor axis of the planet’s orbit).
Is Kepler’s 3rd law correct?
Because for every action there is an equal and opposite reaction, Newton realized that in the planet-Sun system the planet does not orbit around a stationary Sun. … Thus
Kepler’s 3rd Law is approximately valid
because the Sun is much more massive than any of the planets and therefore Newton’s correction is small.
What is the period law?
The Law of Periods:
The square of the period of any planet is proportional to the cube of the semimajor axis of its orbit
.
What is known as a dirty snowball?
Comets
are several miles in diameter, composed of rock, ice and other organic compounds, making them “dirty snowballs” in space, according to NASA’s near earth object program. They originate outside the orbit of the outermost planets and form elliptical orbits that pass close to the sun.
Which planet has lowest gravity?
| Planet Diameter (Compared to Earth) Gravitational Field Strength | Mercury 0.4 4 N/kg | Venus 0.9 9 N/kg | Earth 1 10 N/kg | Mars 0.5 4 N/kg |
|---|
