The sun is this color, which tells us it is average in temperature.
What is yellow?
100
AUs and kilometers are not useful in measuring distances to the stars. In order to measure distances this great, scientists must use this larger unit of measurement.
What is a light year?
100
Astronomers group stars by these three general properties. We notice these qualities when we look at stars in the night sky.
What are brightness, color, and size?
100
Stars that appear to be in a group when viewed from Earth.
What is a constellation?
200
The sun is average in brightness, but appears much brighter than other stars because it is this.
What is closer to Earth?
200
A light year is defined as this.
What is the distance light travels in one year?
200
How bright a star appears from Earth depends on these three properties.
What are size, temperature, and distance from Earth?
200
Our solar system is located near the edge of this galaxy.
What is the Milky Way galaxy?
300
Atoms combine in nuclear reactions in this part of the sun.
What is the core?
300
Other than the sun, this star is the closest to Earth, at 4.3 light years away.
What is Proxima Centauri?
300
A star's color depends on this.
What is it's temperature?
300
A galaxy is a group of billions of stars, dust, and gases in space held together by this.
What is gravity?
400
This part of the sun can only be seen during a solar eclipse. It surrounds the sun's surface, and is made of very hot, glowing gas.
What is the corona?
400
Also known as the North Star, this star is 470 light years from Earth.
What is Polaris?
400
In terms of temperature, stars that are ordered from red, to orange, to yellow, to white, to blue-white, are arranged in this way.
What is from coolest to hottest?
400
The stars in the constellation Cassiopeia would appear to be in different positions when viewed from space than they are when viewed from Earth. This proves that the stars in constellations are not really this.