1. What did observations between 1912 and 1917 show?_____
Between 1912 and 1922,
astronomer Vesto Slipher at the Lowell Observatory in Arizona discovered that the spectra of
light from many of these objects was systematically shifted to longer wavelengths, or redshifted.
____
2.
What did Lemaitres propose the universe was doing?_
He believed that the
universe__
expanded from an initial point, which he called the "Primeval Atom".
____
3. What important discovery did Hubble and his assistant discover about galaxies? __
That
some nebulae were glaxies beyond our own galaxies______
4. What does that mean the universe is doing?
_____
expanding_______________________________________________________
5. What does that mean the universe use to be?
_______
smaller___________________________________________________
6. By observing very distant objects, what can scientists do? ________
7. What was discovered in 1965? ___
cosmic microwave background radiation_
8. Does the universe have a center? ____
No, it is constanly pulling away from each other_____
9. How old do we think the universe is? ___________
13.8 billion years_________
Task 2- Use the following link to answer the questions below Story of the Universe
10. What is the big band theory?
the entire Universe was inside a bubble that was thousands of times smaller than a pinhead. It
was hotter and denser than anything we can imagine.Then it suddenly exploded.