Models of the Solar System
This causes the Sun, moon, and stars to rise in the East and set in the West
What is Earth's rotation?
It takes 28 days for the moon to do this.
What is orbit Earth?
More spherical bodies in space have more of this trait.
What is mass?
This object is mainly composed of dust and ice and has highly elliptical orbits.
What is a comet?
An instrument that collects and concentrates light from distant objects to make the objects appear larger or brighter.
What is a telescope?
This type of model of the solar system has Earth at the center.
What is a geocentric model?
This phase occurs when the side of the moon that reflects sunlight is facing away from Earth.
What is a new moon?
A cloud of dust and gas from which the planets and sun formed.
What is the solar nebula?
These objects would be classified as a planet if not for the surrounding debris
What is a dwarf planet?
The change in the sunlight area of one celestial body as seen from another celestial body.
What is a phase?
This type of model of the solar system has the sun at the center?
What is a heliocentric model?
This occurs when the shadow of one celestial body falls on another.
What is an eclipse?
Laplace's model for solar system formation has our solar system form this.
What is a protoplanetary disk?
These objects are typically seen as shooting stars.
What is a meteor?
The average distance between the Earth and the sun.
What is an astronomical unit?
This Astronomer's model of the solar system gave an explanation for how retrograde, or looping backward, motion of the planets
Who is Ptolemy?
This eclipse occurs when the moon is between the Earth and the sun.
What is a solar eclipse?
The inner planets are formed from rocky material because of this.
What is heat from the sun?
The Milky Way is this kind of galaxy?
What is a barred spiral galaxy?
The darker, inner part of a shadow.
What is an umbra?
This discovery made by Galileo helped provide evidence toward the heliocentric model
What are moons around Jupiter?
In order for a lunar eclipse to occur, the Earth has to do this.
What is cast a shadow on the moon?
All planets orbitng the sun in the same direction, planets being dense collections of rock and gas with strong gravitational fields, and orbital paths of the planets being in about the same plane are explained by this.
What is Laplace's hypothesis on how the solar system formed?
This measurement is used to measure the sizes of galaxies because they are too big to use more common measurements.
What is a light-year?
The apparent shift in position of an object when viewed from different points.
What is parallax?