Archive for Richard Ellis

Hubble Tension in Perspective

Posted in The Universe and Stuff with tags , , , on May 18, 2020 by telescoper

In my office today for the first time in a couple of months I stumbled across a folder containing the notes from the summer school for new Astronomy PhD students I attended in Durham in 1985. Yes, that’s thirty five years ago..

Among the lectures was a set given by Richard Ellis on Observational Cosmology from which I’ve taken this little snippet about the Hubble Constant:

It’s not only a trip down memory lane but also up the cosmological distance ladder! You will see that there were two main estimates, one low and one high. Both turned out to be about three sigma away from the currently-favoured value of around 70.

Plus ça change, plus c’est la même chose…

Does this change your mind about today’s tension between another pair of “low” (67) and “high” (73) values?

Astronomy Look-alikes, No. 16

Posted in Astronomy Lookalikes with tags , on February 15, 2010 by telescoper

I read with great interest a recent story that Geoff Hoon MP is planning to stand down at the next election. No doubt he took this decision in order to avoid the embarassment of losing his seat by popular vote. Perhaps he took his lead from his double, astronomer Richard Ellis, who also recently jumped ship from his Chair at Oxford in order to return to Caltech?

Richard Ellis

Geoff Hoon