The Universe EoY

What is the estimated age of the universe?

13.787 billion years ago

What event began the universe according to the Big Bang theory?

The singularity exploded.

What happens to the universe as it expands?

It became cooler and less dense.

What is redshift?

The phenomenon where light we observe from galaxies has increased wavelength and is stretched as it travels.

What does Hubble's Law state?

The further away a galaxy is, the faster it is moving away from us.

What does the Cosmic Microwave Background Radiation (MBR) represent?

Leftover radiation created during the Big Bang.

Who contributed significantly to the understanding of gravity?

Brian Schmidt and others in the field of gravitational studies.

How do early Indigenous peoples use celestial observations?

For navigation, agriculture, and spiritual practices.

What model did Aristotle develop?

The geocentric model, placing Earth at the center of the universe.

What was the major contribution of Copernicus?

The proposal of the heliocentric model, asserting that planets orbit the Sun.

What does the term 'wavelength' refer to?

The distance between successive peaks of a wave.

What is the relationship between wavelength and the color red in visible light?

Higher wavelength corresponds to more red.

What does looking back in time refer to in astronomy?

Observing further away objects means we are seeing them as they were in the past.

What does the steady state theory state?

That the universe hasn't changed at all.

How does modern interpretation view gravity?

As an element of spacetime rather than a force.

What are protons associated with in terms of weak force?

Radioactive decay in atoms.