Exploring the Brightness of Stars

What is the size comparison between the sun and other stars?

• The Sun is the largest star in the universe.

• The Sun is a supergiant star.

• The Sun is an average-sized star, larger than red dwarfs but smaller than giants and supergiants.

• The Sun is smaller than all types of stars.

How does the distance from Earth affect the apparent brightness of a star?

• The apparent brightness of a star is constant regardless of distance.

• Distance has no effect on the apparent brightness of a star.

• The apparent brightness of a star increases as the distance from Earth increases.

• The apparent brightness of a star decreases as the distance from Earth increases.

What is meant by the term 'apparent brightness'?

• Apparent brightness is the total light emitted by a celestial object.

• Apparent brightness refers to the intrinsic luminosity of a star.

• Apparent brightness is the observed brightness of a celestial object from a specific distance.

• Apparent brightness is the brightness of an object in a vacuum without any distance consideration.

Which color of stars is typically the brightest?

• Blue stars

• Green stars

• Yellow stars

• Red stars

What is luminosity in relation to stars?

• Luminosity is the brightness of a star as seen from Earth.

• Luminosity refers to the distance of a star from Earth.

• Luminosity is the total energy output of a star per unit time.

• Luminosity is the color of a star in the visible spectrum.

Name one factor that affects how visible a star is from Earth.

• Brightness of the star

• Size of the star

• Color of the star

• Distance from Earth

How can two stars be the same size but have different brightness?

• They are at different stages of their life cycle.

• One is a binary star system while the other is a single star.

• One star is much older than the other.

• Different temperatures, compositions, or distances can cause stars of the same size to have different brightness.

What role does a star's temperature play in its brightness?

• A star's temperature determines its brightness; hotter stars are brighter.

• A star's brightness is independent of its temperature.

• A star's brightness is determined by its size, not temperature.

• Cooler stars are always brighter than hotter stars.

Why do some stars appear brighter than others even if they are farther away?

• All stars have the same brightness regardless of distance.

• Some stars are brighter because they are larger in size.

• Some stars appear brighter than others due to their intrinsic luminosity and distance from Earth.

• Stars appear brighter due to atmospheric conditions on Earth.

How does the atmosphere affect our ability to see stars?

• The atmosphere scatters and absorbs light, making stars appear dimmer and causing twinkling, while light pollution can obstruct visibility.

• The atmosphere enhances visibility by reflecting starlight.

• The atmosphere has no effect on how we see stars.

• Stars are only visible from space, not from Earth.