Stellar Temperature & Size

The hottest stars have surface temperatures up to 54,000 ^oF (30,000 K) and are

• red/orange in color.

• blue/violet in color.

• generally just too hot to observe with a telescope.

• about the same size as our Sun.

Tags

NGSS.HS-ESS1-3

The three stars that make up the "belt" in the constellation Orion are

• yellow stars like our Sun (or Sol ).

• all going to blow up as supernovae very soon.

• all very hot blue giant stars.

• called Mintaka & Bellatrix.

Tags

NGSS.HS-ESS1-3

Examples of very hot blue/violet stars include

• the Sun (or Sol ) and Alpha Centauri A.

• Mintaka, Rigel & Sirius.

• Betelgeuse & Mira.

• Alpha Centauri B & Proxima Centauri.

Tags

NGSS.HS-ESS1-3

Yellow or "medium" hot stars like our Sun & Alpha Centauri A have surface temperatures around

• 1 million degrees Fahrenheit.

• 10,000 degrees Celsius.

• 1 million degrees Celsius.

• 10,000 degrees Fahrenheit.

Tags

NGSS.HS-ESS1-1

Relatively "cool" stars (5000 ^oF surface temps) are generally

• red in the visible light spectrum.

• going to blow up pretty soon.

• yellow in the visible light spectrum.

• not found very often in our galaxy.

Tags

NGSS.HS-ESS1-3

Basically the ____ index of stars allow astronomers to determine stellar surface temperatures.

• Doppler

• color

• spectral

• radial

Tags

NGSS.HS-ESS1-1

Stellar classification is the classification of stars based on their ____ characteristics.

• spectral

• color

• stellar

• size

EM radiation from a star is analyzed by splitting it with a

• prism.

• charged coupled device (CCD).

• telescope.

• diffraction grating.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

A star's spectrum exhibits the rainbow of colors interspersed with

• bright-line emissions.

• absorption lines.

• a continuous spectrum.

• Fraunhofer lines.

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Stars are classified based on spectral type & temperature with "O-type" stars

• the coolest.

• classified as the most dangerous.

• somewhere in the middle temperature-wise.

• the hottest.

Tags

NGSS.HS-ESS1-3