Stars
Star Measurement
The Sun
Planets
Famous Scientist

100

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 _______.
Ptolemy