Brightness of Stars Review

The image below shows a star's luminosity as viewed from Earth. Decide if the star's luminosity is least luminous, more luminous, or most luminous.

• least luminous

• more luminous

• most luminous

The image below shows a star's luminosity as viewed from Earth. Decide if the star's luminosity is least luminous, more luminous, or most luminous.

• least luminous

• more luminous

• most luminous

Stars are natural bodies that give off their own _________________.

• distance

• far away

• light

• closer

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS4-1

NGSS.HS-PS4-3

What do scientists use because they cannot physically travel to a star to take its exact measurements?

• apparent brightness

• absolute brightness

• apparent calculations

• absolute calculations

Luminosity in measured in _____>

• grams

• meters

• ohms

• watts

What three factors are considered when discussing apparent brightness of a star?

• time

• distance

• temperature

• color

• luminosity

What happens to brightness as distance increases?

• As distance increases, the brightness stays the same.

• As distance increases, the brightness increases.

• As distance increases, the brightness decreases.

After the Sun, which star is the next brightest?

• Nu² Lupi

• Tau Ceti

• Alpha Centauri A

What is the term used to describe the intrinsic brightness of a star, independent of its distance from Earth?

• Apparent Magnitude

• Absolute Magnitude

• Relative Brightness

• Stellar Luminosity

Which unit is commonly used to express the luminosity of stars?

• Joules

• Watts

• Lumens

• Candela