Andromeda Galaxy – Galaxy closest to ours 2.5 Million light year away.

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Presentation transcript:

Andromeda Galaxy – Galaxy closest to ours 2.5 Million light year away

Intro to astronomy youtube zppIMhttp:// zppIM

Light year Distance Light travels in one year in a vacuum Equals 300,000 km/sec or 186,000 mi/sec A light year is about 6 trillion miles long

Crab nebula

Universe Current Theory of Origin Big Bang Universe started as an extremely dense single point and exploded outward Age - 10 – 16 Billion Years

Big Bang Evidence 1. Cosmic Background Radiation – Residual energy (or faint microwave radiation) found all over in space due to the cooling of the fireball

N5tlIhttp:// N5tlI my/21st-century-astro3/astrotours.aspxhttp:// my/21st-century-astro3/astrotours.aspx

Doppler Effect

Big Bang Evidence 2.Red shift of all galaxies Galaxies are moving away from us

Shifted toward the longer wavelength Shifted toward the red Galaxies are moving away, therefore universe is still expanding Wavelengths are longer Wavelengths are shorter

Doppler Effect

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