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letra de galaxies - kevin hart 6

hook

what is a galaxy made of?our galaxy, the milky way, is typical: it has hundreds of billions of stars, enough gas and dust to make billions more stars, and at least ten times as much dark matter as all the stars and gas put together. and it’s all held together by gravity

what galaxy are we in? as we are part of the solar system earth pretty much follows the path of the sun as it goes through its own orbit around the galaxy. the milky way is a spiral galaxy type so it has arms sort of like an octopus. the sun is located near the outward tip of the sagittarius arm of the milky way

verse 1 ) our galaxy, the milky way its typical. it have hundreds of billions of stars. enough gas and dust to make even more billions of stars. without our galaxy we wouldn’t be here so care and nurture it. the milky way is a spiral galaxy so it has arms sort of like a octopus. the sun is located near the outward tip of the sagittarius arm of the milky way. are galaxy is held together by an gravitational attraction

verse 2

verse 2: (tier 1/2) (start tuesday)
hubble’s law- distant galaxies we see in all directions are moving away from away
explain redshift- redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum
describe why most galaxies are redshifted- whenever a light source moves away from an observer
why is the andromeda galaxy blue shifted?- then observed from earth, its light is undergoing a blueshift

- kevin hart 6

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