Theories of the Universe

Front

Who proposed the Heliocentric Model of the universe?

Back

Copernicus proposed the Heliocentric Model, which places the Sun at the center of the universe.

Front

What is the Big Bang Theory?

Back

The Big Bang Theory suggests that the universe began from a very hot and dense state and is continually expanding.

Front

What does the Geocentric Model state?

Back

The Geocentric Model states that the Earth is at the center of the universe, and all celestial bodies revolve around it.

Front

What evidence supports the idea that galaxies are moving away from us?

Back

The redshift of light from distant galaxies indicates they are moving away, supporting the expansion of the universe.

Front

How old do scientists estimate the universe to be?

Back

Scientists estimate the universe to be approximately 13.8 billion years old.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system and is part of the larger universe.

Front

What is a galaxy?

Back

A galaxy is a massive system of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

Front

What is dark matter?

Back

Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What is the observable universe?

Back

The observable universe is the part of the universe that we can see and measure, limited by the speed of light.

Front

What is the difference between a planet and a star?

Back

A planet orbits a star and does not produce its own light, while a star generates light and heat through nuclear fusion.