Astronomy

Front

What is a blue supergiant star?

Back

A blue supergiant star is a massive star that is hotter and brighter than a red giant star, characterized by its blue color due to high temperatures.

Front

What is the primary component of the Sun?

Back

The Sun is mostly made up of hydrogen, which constitutes about 74% of its mass.

Front

Define luminosity in the context of stars.

Back

Luminosity is the total amount of energy emitted by a star per unit of time, often measured in watts.

Front

Which star is brighter than Alpha Centauri B but dimmer than the Sun?

Back

Tau Ceti is brighter than Alpha Centauri B but dimmer than the Sun.

Front

What is a black hole?

Back

A black hole is an object with a gravitational pull so strong that nothing, not even light, can escape from it.

Front

What is the difference between a red giant and a blue supergiant?

Back

A red giant is cooler and less luminous than a blue supergiant, which is hotter and more luminous.

Front

What is the significance of a star's color?

Back

A star's color indicates its temperature; blue stars are the hottest, while red stars are the coolest.

Front

What is the process of nuclear fusion in stars?

Back

Nuclear fusion is the process by which stars convert hydrogen into helium, releasing energy that powers the star.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages such as nebula, main sequence, red giant, and, depending on its mass, either a supernova or a black hole.

Front

What is the Hertzsprung-Russell diagram?

Back

The Hertzsprung-Russell diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.