Recognize how redshift suggests the Universe is expanding.
This video uses an astronomer, a flying saucer, and a cow to help explain this difficult astronomical concept in simple terms.
Reviews evidence for the expansion of the Universe.
Come up with questions about a topic and learn new vocabulary words to determine answers using an Ask, Answer, Learn table.
It is the space in the Universe that is expanding, not everything in it.
Explores the battle between forces in the universe and the ultimate fate of the universe.