Gravitational Attraction
We can think about gravity as the pulling of what across the universe?
Stretchy Fabric
What is Kepler's First Law of Planetary Motion?
The orbit of a planet around the sun is an ellipse
What unit do we use to measure the distance between the Sun and planets within our solar system?
Astronomical Unit (AU)
True or false: we can tell how far away a star is just by staring through a telescope
False
The doppler effect explains the change in _______________ as an object moves toward or away from you.
Frequency
A heavier object (object with more mass) will have MORE or LESS gravitational force?
MORE
An ellipse is a curve surrounding two points. What are these points called?
Foci (or focus)
Which unit of measurement do we use to measure the distance of things outside of our solar system (stars, nebulas, and galaxies)
Light year
Triangulation is a method of measuring distance indirectly by creating an _________________________ between the observer and the object in the distance
Imaginary Triangle
When a sound is approaching you, it appears ____________ in pitch
Higher
The marble falls into the center (gravity pulls it into the center)
Empty Focus
What is the definition of a light year?
The distance light travels in one year
What type of mathematical theory do we use in triangulation?
Trigonometry
When a sound is moving away from you it appears _____________ in pitch
Lower
If we give the marble a push what happens?
It follows an elliptical path
True or False: The total distance from one focus to a point on the ellipse and back is CONSTANT for every point on the ellipse.
True
_________________ describes the apparent shift in position of a nearby object when viewed from two different places
Parallax
When a star is moving away from you (exhibits LOW frequency), the star appears what colour?
Red
When a star is moving toward you (exhibits high frequency), the star appears what colour?
Blue