4 ms·
A few other amusing notes: 1. Hubble's draftsman made an error while preparing his famous diagram. From Figure 1 of his paper (http://adsabs.harvard.edu/abs/1
by splat 15y ago
A few other amusing notes:
1. Hubble's draftsman made an error while preparing his famous diagram. From Figure 1 of his paper (http://adsabs.harvard.edu/abs/1931ApJ....74...43H http://adsabs.harvard.edu/abs/1931ApJ....74...43H), you'll notice that the vertical axis is in "km" rather than "km/sec."
2. Measurements of the Hubble Constant over time: http://www.pnas.org/content/101/1/8/F2.large.jpg http://www.pnas.org/content/101/1/8/F2.large.jpg For some reason it's not plotted logarithmically so it's hard to see the convergence towards ~70 km/s/Mpc in the last twenty years.
- kghose 15y agoThat's a cool graph. It's hard to see, but it looks like we can't say it is distinguishable from zero?
- duskwuff 15y agoZero is the very bottom of the graph. The consensus value is somewhere between 50 - 100.
- splat 15y agoInterestingly, there was a long fight in the field of cosmology from ~1960 until ~1990 as to whether the Hubble constant was 50 or 100. It wasn't until within the past twenty years or so that the community began to agree upon the now-accepted value of ~70 km/s/Mpc.