Lesson 14 Flashcards
Why do you see different stars during different times of the year?
The Earth revolves around the sun and the night sky faces different sections of the universe in its orbit.
Which group of stars is always present in the night sky of the Northern Hemisphere?
The Little Dipper.
What is the name of the North Star?
Polaris.
What is special about the star named Sirius?
It’s the brightest star.
What is a black hole?
A collapsed star that is so small and massive that its gravity pulls in everything (even light) near it.
What is a supernova?
An exploding star.
Describe the 3 star categories.
Temperature, brightness, and total energy output (size).
What is a galaxy?
A large group of stars.
In which galaxy is Earth?
The Milky Way.
What is the shape of our galaxy?
Spiral.
What is a constellation?
A pattern of stars in the sky that make a dot-to-dot picture.
How are constellations used today?
They help us identify where stars, planets, and other celestial objects are located.
What did Neil Armstrong say when he stepped on the moon?
“That’s one small step for man, one giant leap for mankind.”
What is a space station?
An artificial satellite where people live and work.
How do you become an astronaut?
Take a lot of math and science classes. Specialize in your favorite area of science, because NASA needs scientists in every field.
