Which star color indicates an 8000K main sequence star? (1) blue (3) yellow (2) white (4) red.

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Presentation transcript:

Which star color indicates an 8000K main sequence star? (1) blue (3) yellow (2) white (4) red

Light, stars, and the expanding universe… Textbook Pages

Which type of electromagnetic energy has the longest wavelength? (1) infrared radiation (2) radio wave radiation (3) ultraviolet radiation (4) x-ray radiation

Light takes seconds

Light takes about 1.5 seconds

Light takes about 8.5 minutes

Our telescopes really look into the past. Billions of years ago we see the energy from the “Big Bang”.

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