Characteristics of the Universe Review 2021

Front

What is a Nebula?

Back

A Nebula is an interstellar cloud of dust and gas, primarily hydrogen and helium, where stars are born.

Front

What force causes planets to travel in curved paths around the sun?

Back

Gravitational attraction between the sun and the planets.

Front

What is the primary force that controls the motion of planets in our solar system?

Back

Gravity.

Front

What spectral class does a star with a temperature of approximately 2,800 K belong to?

Back

Spectral class M.

Front

What is the classification of the sun?

Back

The sun is classified as a main sequence, medium-sized star.

Front

How far is Barnard's Star from the sun?

Back

Barnard's Star is about 5.9 light-years from the sun.

Front

What is the main component of a Nebula?

Back

The main components of a Nebula are dust and gases, primarily hydrogen and helium.

Front

What is the significance of gravitational attraction in the solar system?

Back

Gravitational attraction keeps planets in orbit around the sun and governs their motion.

Front

What is the difference between a star and a Nebula?

Back

A star is a luminous celestial body that generates energy through nuclear fusion, while a Nebula is a cloud of gas and dust where stars can form.

Front

What is the closest star to Earth?

Back

The closest star to Earth is Proxima Centauri, not the sun.