Jpg 1arcsecond 13600o 1 au astronomical unit 15

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: over space at any =me. H 0 = 71 km/(s ! Mpc) = 21.8 mm/(s ! ly) 4 Expansion of the Universe hJp:// upload.wikimedi commons/d/d7/ Protractor_Rapp orteur_Degree_ V1.jpg 1 ­arcsecond = 1/3600o. 1 AU (astronomical unit) = 1.5 x 1011 m = average Earth ­Sun separa<on. 1 ly (light ­year) = 9.46 x 1012 km = the distance light travels in 1 year. 1 pc (parsec) is the distance at which there is 1 ­arcsecond angular separa<on between two objects 1 AU apart.   1 pc = 3.26 ly; 1 Mpc = 3.26 x 106 ly. 1 pc         hJp:// ­for ­ ­parsec.gif hJp://</tutorial/measure/images/parallax.jpeg (Modified) 5 The Hubble Space Telescope •  Determining the Hubble constant has been the key goal of the Hubble Space Telescope, which can measure distances to galaxies with unprecedented accuracy. •  Construc<on of the Hubble Space Telescope was completed in 1985. •  The launch of Hubble was delayed due to the 1986 Space ShuJle Challenger disaster. •  The Telescope was launched on the Space ShuJle Discovery in 1990. The Hubble Space Telesc...
View Full Document

Ask a homework question - tutors are online