菲尔兹奖获得者陶哲轩做爱因斯坦讲座：“测量宇宙距离的梯子”

（转自美国数学会网站）

__ 陶哲轩__所做的爱因斯坦讲座：“测量宇宙距离的梯子”（见

相关链接：美国数学会英文报道

**2010 Einstein Lecture: "The Cosmic
Distance Ladder," by Terence Tao**

An overflow crowd of approximately 900 people saw Terence
Tao's 2010 Einstein Lecture, "The Cosmic Distance Ladder," which took
place October 9 as part of the AMS Fall Western
Sectional meeting at UCLA. In addition to the audience in Schoenberg Hall,
people watched in an overflow room and on a Jumbotron
screen set up outside.

In the lecture, Tao addressed how we know the distances
from the earth to the sun and moon, from the sun to the other planets, and from
the sun to other stars and distant galaxies. These distances can't be measured
directly, but there are many indirect methods of measurement, combined with
basic mathematics, which can give convincing and accurate results without the
need for advanced technology. These methods rely on climbing a "cosmic
distance ladder," using measurements of nearby distances to deduce
estimates on distances slightly farther away.

The AMS Einstein
Public Lectures in Mathematics began in 2005 to celebrate the 100th
anniversary of Albert Einstein's *annus** mirabilis, *when
he published three fundamental papers that changed the course of
twentieth-century physics. The lectures are given annually at one of the
Society's eight sectional meetings and are supported by a gift from an
anonymous donor.