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What is the Milky Way?
A pale band of light we can see at night (or a galaxy)
What is our Sun called?
A star
The writer says that stars look like...
tiny diamonds fastened to a ceiling.
Why do other stars look smaller than our Sun?
They are much farther away from us than the Sun is.
Why do scientists use a special unit to measure distance?
Because distances in space are so big
What is the distance between the sun and Earth?
150 million kilometers (93 million miles)
What is a light year?
The distance it takes for light to travel in a year
Why can humans not travel to other stars?
Because they are too far away
What do scientists call a pattern of stars?
Constellations
When did scientists start using telecopes?
In the 1600s
Look at the chart on page 444. Which is hotter, a young blue giant star or a red dwarf star?
Young blue giant
How hot is the surface of the Sun?
5,500 degrees Celsius (or 10,000 degrees Fahrenheit)
What is the name for smaller stars?
Dwarf stars
How have telescopes changed over time?
They have become more powerful and allow us to see things that are very far away.
Is the Sun bigger or smaller than normal stars?
Smaller
What is the fastest moving thing in the universe?
Light
