Types of Stars

Front

What is a brown dwarf star?

Back

A brown dwarf star is a substellar object that is too massive to be considered a planet but not massive enough to sustain hydrogen fusion reactions in its core, typically having a mass between 13 and 80 times that of Jupiter.

Front

How much greater is the mass of brown dwarf stars compared to Jupiter?

Back

At least 15 times.

Front

What is the first stage of a star's life cycle?

Back

The first stage of a star's life cycle is the protostar stage, where a cloud of gas and dust begins to collapse under its own gravity.

Front

What is the approximate surface temperature of the sun?

Back

The approximate surface temperature of the sun is 5,500 degrees Kelvin.

Front

What is the average life span of a main-sequence star?

Back

The average life span of a main-sequence star is between 10 billion to 50 billion years.

Front

At which stage does a star stabilize to create an equilibrium between gravitational force and pressure from gas?

Back

A star stabilizes during the main sequence stage.

Front

What is a main-sequence star?

Back

A main-sequence star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium in its core.

Front

What is a neutron star?

Back

A neutron star is the remnant core of a massive star that has undergone a supernova explosion, composed almost entirely of neutrons.

Front

What is a red giant?

Back

A red giant is a late stage in the life cycle of a star, characterized by a large radius and a reddish color, occurring after the star has exhausted hydrogen in its core.

Front

What is the process of nuclear fusion in stars?

Back

Nuclear fusion is the process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy, and is the primary source of energy for stars.