Which is the best description of Earth’s orbit?(1 point)
Responses
parabolic
parabolic
almost circular
almost circular
highly elliptical
highly elliptical
circular
2 months ago
2 months ago
Which orbital shape did most scientists in the early 1600s think the planets of our solar system have?(1 point)
Responses
hyperbolic
hyperbolic
elliptical
elliptical
parabolic
parabolic
circular
2 months ago
Most scientists in the early 1600s thought the planets of our solar system had a **circular** orbital shape. This belief persisted until Johannes Kepler proposed his laws of planetary motion, which demonstrated that planetary orbits are elliptical.
2 months ago
Which planet’s orbit was Kepler first studying when he began to develop his laws of orbital motion?(1 point)
Responses
Saturn
Saturn
Jupiter
Jupiter
Earth
Earth
Mars
2 months ago
Kepler was first studying the orbit of **Mars** when he began to develop his laws of orbital motion. His observations of Mars' trajectory led to the formulation of his first two laws.
2 months ago
Which of these describes Kepler’s third law of orbital motion?(1 point)
Responses
T3 ∝a2
T3 ∝a2
T2∝a
T2∝a
T2 ∝ a3
T2 ∝ a3
T∝a2
2 months ago
Kepler's third law of orbital motion is described by **T² ∝ a³**, where T is the orbital period of a planet and a is the semi-major axis of its orbit. This law states that the square of the period of a planet's orbit is directly proportional to the cube of the semi-major axis of its orbit.
2 months ago
Which statement describes Kepler’s third law of orbital motion?(1 point)
Responses
The square of orbital period is proportional to the cube of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.
The square of orbital period is proportional to the semi-major axis.
The square of orbital period is proportional to the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.
The orbital period is proportional to the square of the semi-major axis.
2 months ago
The correct statement that describes Kepler’s third law of orbital motion is:
**The square of orbital period is proportional to the cube of the semi-major axis.**
This expresses the relationship \( T^2 \propto a^3 \), where \( T \) is the orbital period and \( a \) is the semi-major axis.