The Universe Review

Front

What is Doppler shift?

Back

Doppler shift is the phenomenon where the wavelength in front of an object gets shorter and behind it gets longer, indicating the object's movement relative to the observer.

Front

What is a nebula?

Back

A nebula is a cloud of gas and dust in space, often serving as a region for star formation.

Front

What factors affect gravity?

Back

Gravity is affected by mass and distance; the greater the mass, the stronger the gravitational pull, and the farther apart two objects are, the weaker the gravitational attraction.

Front

What did Edwin Hubble discover about galaxies?

Back

Edwin Hubble discovered that galaxies are mostly moving away from us, indicating that the universe is expanding.

Front

How is raisin bread similar to the universe?

Back

Raisin bread is like the universe because the raisins spread out from each other as the bread rises, similar to galaxies shifting apart in the expanding universe.

Front

What is the definition of a galaxy?

Back

A galaxy is a massive system that consists of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

Front

What is the Big Bang Theory?

Back

The Big Bang Theory is the leading explanation for the origin of the universe, suggesting it began as a singularity and has been expanding ever since.

Front

What is dark matter?

Back

Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects on visible matter.

Front

What is a black hole?

Back

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

Front

What is the role of gravity in the universe?

Back

Gravity is the force that holds galaxies, stars, and planets together, influencing their movements and interactions.