Components of the Universe

Front

What is the distance between wave crests called?

Back

Wavelength

Front

What will the sun become when it runs out of fuel?

Back

A white dwarf

Front

What does the Hertzsprung-Russell diagram show about main-sequence stars?

Back

They increase in brightness as they increase in temperature.

Front

Why can't people on Earth see the entire shape of the Milky Way galaxy?

Back

Earth is a part of this galaxy.

Front

What does the absolute brightness of a star depend on?

Back

Size and temperature.

Front

What is a galaxy?

Back

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

Front

What is a black hole?

Back

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 absolute magnitude and apparent magnitude?

Back

Absolute magnitude measures a star's brightness at a standard distance, while apparent magnitude measures how bright a star appears from Earth.

Front

What is a neutron star?

Back

A dense remnant of a supernova explosion, composed mostly of neutrons.

Front

What is the role of gravity in the universe?

Back

Gravity is the force that attracts objects with mass towards each other, governing the motion of planets, stars, and galaxies.