Re: Great place for our spaceport
http://www.esa.int/esaMI/Operations/SEMM17XJD1E_0.html
says
L1 is a very good position for monitoring the Sun. The solar wind reaches it about one hour before reaching Earth. In 1978, the International Sun-Earth Explorer-3 (ISEE-3) was launched towards L1, where it conducted such observations for several years. Now the ESA/NASA SOHO solar watchdog is positioned there.