welder glasses
今年２番目の天体ショー、金星のイケ面、ではなかった太陽（日）面通過の日が近づいてきました。NASAはサイズ１４のwelder glasses（フィルターメガネ）での観測を推奨しています。（UG）
Venus transit day: Don't miss this twice-in-a-lifetime experience
By Amy Hubbard
June 1, 2012, 1:30 p.m.
Tuesday is Venus transit day -- that hole-in-the-sun journey taken by our neighboring planet -- and unlike the last time this occurred, the event will be visible to all of North America. Not that you should look at it.
As NASA notes, Venus is too minuscule to block the blinding glare of the sun. You need a filter. NASA suggests No. 14 welder's glasses.
You might be better off contacting a local astronomy club, which probably will have solar telescopes for observing the transit. In Los Angeles, the Griffith Observatory will have telescopes set up on the lawn for free viewing, as The Times reported Thursday.
http://www.latimes.com/news/nation/nationnow/la-na-nn-venus-transit-20120601,0,3065385.story
