Cosmosology Review

The observation that the farther away a galaxy is, the faster it is moving away, is called

• Hubble's Law
• the theory of relativity
• the axion theorem
• Cepheid variability

Who was it that discovered Cepheid Stars and used them to determine distances in the Universe?

• Ptolemy
• Henrietta Swan Leavitt
• John C Mather
• Albert Einstein

A pulsating variable star that follows a period-luminosity relation and hence is very useful for measuring cosmic distance

• Supernovas
• Cepheid stars
• Gamma Ray Bursts
• Haley's Comet

What's an emission spectrum?

• a mixture of gases that make up an atmosphere
• a mixture of liquids that make a maglosphere
• a unique spectrum of the electromagnetic radiation emitted by a source
• a unique mixture of galaxies that create an interstellar cosmic event.

Who developed the theory of relativity, including e=mc^2?

• Albert Einstein
• Henrietta Swan Leavitt
• John Lithgow
• Evangeline Lilly

Who launched a satellite to confirm and measure the cosmic background radiation?

• Jaeger Schnaups
• Chandra
• It Chi Buht
• John C Mather

What would the universe be like if gravity was stronger?

• The universe would be expanding faster.
• Everything would be in black holes.
• No stars or planets would be able to form.
• Orbits would come to a stop

What was the first element to form?

• Helium
• Nitrogen
• Hydrogen
• Carbon

How old is the Universe?

• 1.2 billion years
• 785 million years
• 1.4 gazillion years
• 13.8 billion years

Who proved that other galaxies existed beyond the edge of the Milky Way?

• Edwin Hubble
• Obi-Won Kenobi
• Ho Chi Minh
• Vera Rubin