Astronomy Regents Review

Front

What event occurred more than 10 billion years ago?

Back

The Big Bang is the event that occurred more than 10 billion years ago, marking the beginning of the universe.

Front

What evidence supports the idea that the universe is expanding?

Back

The observation that the wavelengths of light from distant galaxies are shifted toward the red end of the spectrum indicates that they are lengthened, supporting the expansion of the universe.

Front

What is the final stage in the life cycle of the most massive stars?

Back

The final stage in the life cycle of the most massive stars is a black hole.

Front

Which planet has an orbital eccentricity most similar to that of the Moon?

Back

Saturn has an orbital eccentricity most like that of the Moon.

Front

In a geocentric model, which object is represented by the letter X?

Back

In a simple geocentric model, the object represented by the letter X is Earth.

Front

What is the Big Bang?

Back

The Big Bang is the leading explanation for the origin of the universe, describing the rapid expansion from a hot, dense state.

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object is shifted to longer wavelengths, indicating that the object is moving away from the observer.

Front

What is a black hole?

Back

A black hole is a region of space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is the difference between a white dwarf and a black dwarf?

Back

A white dwarf is a small, dense star that has exhausted most of its nuclear fuel, while a black dwarf is a theoretical stellar remnant that has cooled and no longer emits significant heat or light.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages such as nebula, main sequence, red giant, and depending on its mass, it may end as a white dwarf, neutron star, or black hole.