Components of the Universe STAAR Review

Front

What is a galaxy?

Back

A system of stars, gas, dust, and dark matter bound together by gravity.

Front

What type of galaxy is characterized by a flat, rotating disk containing stars, gas, and dust, and a central concentration of stars known as the bulge?

Back

Spiral Galaxy.

Front

What type of galaxy has an ellipsoidal shape and lacks the structure of spiral galaxies?

Back

Elliptical Galaxy.

Front

What type of galaxy does not have a distinct shape and is often chaotic in appearance?

Back

Irregular Galaxy.

Front

Which type of electromagnetic radiation has the longest wavelength?

Back

Radio Waves.

Front

What is the relationship between wavelength and frequency in electromagnetic waves?

Back

As wavelength increases, frequency decreases.

Front

What is dark matter?

Back

A form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What is the Big Bang Theory?

Back

The leading explanation for the origin of the universe, proposing that it began as a singularity and has been expanding ever since.

Front

What is a nebula?

Back

A giant cloud of dust and gas in space, often the birthplace of stars.

Front

What is the difference between a star and a planet?

Back

A star is a luminous celestial body made of plasma that generates energy through nuclear fusion, while a planet is a celestial body that orbits a star and does not produce its own light.