C2L1 - The View from Earth

the true brightness of an object in space

• apparent magnitude

• astronomical unit

• luminosity

• spectroscope

the brightness of an object as seen from Earth

• apparent magnitude

• luminosity

• spectroscope

• light-year

divides light into different wavelengths

• spectroscope

• luminosity

• apparent magnitude

• light-year

average distance between Earth and the Sun

• astronomical unit

• luminosity

• spectroscope

• apparent magnitude

the distance light travels in one year

• light-year

• luminosity

• apparent magnitude

• spectroscope

What do astronomers use to divide the sky into regions?

• star spectra

• constellations

• astronomical unit

• temperature

Star light provides information about the star's

• age.

• speed.

• temperature.

• distance.

What would astronomers use to measure the distance between the Sun and the star Proxima Centauri?

• light-years

• astronomical units

• apparent magnitudes

• absolute magnitudes

A star's luminosity does NOT depend on the star's

• size.

• temperature.

• apparent magnitude.

Astronomers measure how far an object is from Earth by using angles created by

• spectra

• parallax

• astronomical units

• apparent magnitude