The final stage in the evolution of the most massive stars is a ________.
black hole
100
The point in stellar evolution when a star has used up all its fuel and is radiating away its remaining thermal energy as light is the _______ stage.
white dwarf
100
The visible surface of the sun is called the ______.
photosphere
100
Pluto is now classified as a ______ in our solar system.
Dwarf planet
100
This scientist determined the nature of the forces that kept the planets in their orbits.
Sir Isaac Newton
200
Which color stars have the coolest surface temperature?
red
200
The distance to stars can be determined from ________.
stellar parallax
200
Dark, cooler patches on the surface of the sun are called _________.
sunspots
200
The belt (orbit) of the asteroids is located between _________.
Jupiter and Mars
200
The first modern astronomer to propose a Sun-centered universe was _______.
Nicolaus Copernicus
300
Which color stars have the highest surface temperature?
blue
300
The sun belongs to this class of stars.
main – sequence star
300
The layer of the solar atmosphere directly above the photosphere is referred to as the ________.
chromosphere
300
________ has the great, dark spot on its surface.
Neptune
300
Three laws of planetary motion were discovered by ______.
Johannes Kepler
400
Most stars are in this stage of evolution.
main – sequence star
400
The measure of a star’s brightness is called its _________.
magnitude
400
The outermost layer of the Sun is called the ________.
corona
400
The surface features of ________ are known only through satellite radar mapping.
Venus
400
This scientist was the first to use the telescope in astronomy.
Galileo
500
These stars are produced during a supernova event.
black hole
500
The apparent westward “drift” of the planets compared to the background stars is called _________.
Retrograde motion
500
The layer of the Sun that radiates most of the light that reaches Earth is called the _______.
photosphere
500
________ has a hot, turbulent atmosphere dominated by carbon dioxide.
Venus
500
The Earth-centered system of the universe that was accepted for nearly seventeen centuries was presented in a treatise called the Almagest that was written by _______.