Astronomy Cosmology and Deep Space 4

Question 1

The relationship between a galaxy's distance and its recession velocity is known as:

Accepted Answer

Hubble's Law

Answer

Kepler's Law

Answer

Newton's Law

Answer

Ohm's Law

Question 2

What were the first elements formed in significant amounts shortly after the Big Bang?

Accepted Answer

Hydrogen and helium

Answer

Carbon and oxygen

Answer

Iron and nickel

Answer

Gold and uranium

Question 3

Gravitational lensing occurs when:

Accepted Answer

Massive objects bend light from more distant sources

Answer

Stars explode into supernovae

Answer

Galaxies emit radio waves

Answer

Planets block starlight

Question 4

The discovery that the universe's expansion is accelerating was based on observations of:

Accepted Answer

Distant Type Ia supernovae

Answer

Nearby planets

Answer

Solar flares

Answer

Lunar eclipses

Question 5

What is the cosmic web?

Accepted Answer

The large-scale filamentary structure of galaxies and dark matter

Answer

A network of radio telescopes

Answer

The magnetic field of the Sun

Answer

A ring around Saturn

Question 6

A parsec is a unit used to measure:

Accepted Answer

Astronomical distance

Answer

Stellar temperature

Answer

The mass of a galaxy

Answer

The age of a star

Question 7

Why does the night sky appear dark despite countless stars (Olbers' paradox)?

Accepted Answer

The universe has a finite age and is expanding

Answer

Stars only shine during the day

Answer

Dust absorbs all starlight

Answer

There are very few stars