History
Who won the space race?
USA
What are the two lightest elements that formed right after the Big Bang?
Hydrogen and Helium
What shape is the Milky Way galaxy?
Spiral
What's the closest star to the Earth?
the Sun
What is the big bang theory?
The theory of the origin and evolution of the universe
How old is the universe?
13.8 billion years old
What is the closest galaxy to ours?
The Andromeda Galaxy
What force pulls gas and dust together to form a new star?
Gravity
Who discovered that galaxies are moving away from each other, showing that the universe is expanding?
Edwin Hubble
What process creates heavier elements inside stars?
Nuclear fusion
What kind of galaxy has little gas or dust and mostly old stars?
Elliptical galaxies
What is the main element stars burn during the majority of their lifetimes?
Hydrogen
What is the term for the brief period of extremely rapid expansion right after the Big Bang?
Cosmic inflation
What term describes the first generation of stars made almost entirely of hydrogen and helium?
Roughly how many galaxies are there in the observable universe?
2 trillion
What color are the coldest stars?
Red
What kind of radiation is leftover from the Big Bang and still detectable today?
Cosmic Microwave Background (CMB)
What is dark energy responsible for in the evolution of the universe?
The accelerated expansion of the universe
What do we call the massive black hole at the center of our galaxy?
Sagittarius A-star
What 2 possible objects can form after a supernova?