Match the following types of planetary orbits with the correct description.

• A perfectly round planetary orbit (not typical for planets in our solar system).

• Elliptical

• The shape of the orbits of all planets in our solar system.

• Circular

• An orbit that is very stretched out and elongated.

• Highly Eccentric

An orbit with the eccentricity of 0.9 would have more of a(n) __________ shaped orbit.

• Circular
• Elongated
• Spiral

The value of eccentricity can range from (a)   to (b)   .

• 0.1; 0.9
• -1; 0
• 0; 100
• 0; 1

Our solar system can best be described by the (a)   model.

• Heliocentric
• Geocentric

Tags

NGSS.MS-ESS1-2

Invented calculus and the Laws of Gravity

• Brahe
• Newton
• Aristarchus
• Galileo

Tags

NGSS.HS-PS2-4

Which shape has the eccentricity of zero and a single focus?

• Spiral
• Oval
• Circle
• Dodecahedron

Which of the following astronomers held and promoted this view of the solar system? Check all that apply.

• Aristarchus
• Ptolemy
• Copernicus
• Tycho Brahe
• Johannes Kepler

Tags

NGSS.MS-ESS1-1

What effect does increasing the distance between an ellipse’s foci have on the shape of an ellipse?

• Increases eccentricity
• Decreases eccentricity
• No effect

Match the following astronomers with their contributions to the study of planets.

• Formulated the laws of planetary motion

• Galileo

• First to record planetary positions (especially Mars) after long-term sky observations without a telescope

• Kepler

• Discovered the expansion of the universe

• Brahe

• First to use a telescope for astronomical observations

• Hubble

Which statement best describes Kepler’s 2nd Law of Planetary Motion?

• Planets revolve around the sun over equal areas in equal time intervals
• Planetary orbits are in the shape of an ellipse
• A planet’s orbital period is proportionate to its distance from the sun