Lect_1_Intro

How do we know how fast galaxies are moving away from

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: s are moving away from us? We can measure galactic velocities by measuring the redshift of their light, which is how much the light has shifted towards the red end of the light spectrum (similar to the Doppler shift that affects sound waves emanating from a moving source). Another way we can learn about the Big Bang and the birth of the universe: by measuring the Cosmic Microwave Background. The first observation of the cosmic microwave background was accidental......
View Full Document

Ask a homework question - tutors are online