Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
7 Cards in this Set
- Front
- Back
|
What is a Star?
|
An object in space made of hot gas,with a core like a thermonuclear reactor.
|
|
|
What is Interstellar Matter made of?
|
It is made of gas and dust.
(dust is only 1% of total mass of all interstellar matter) |
|
|
What is a Black Hole?
|
After a star twenty-five times the size of the sun explodes in a supernova,it becomes a black hole and collapses into itself.
|
|
|
Hertzsprung-Russell Diagram
|
bright&hot bright&cool
massive intermediate low dim&hot dim&cool |
|
|
What is a Supernova?
|
An explosion caused by a supergiant using up all of its fuel and then collapsing on its self.
|
|
|
What is Fusion?
|
Hydrogen atoms combine to form the heavier element Helium.
|
|
|
What is the Doppler Effect?
|
The change in wavelength because of motion.
|
