The most common substance in the universe is called dark matter. It doesn’t shine or reflect light. We can’t even see it. Image right: This Hubble Space Telescope composite image shows a ghostly "ring" of dark matter in the galaxy cluster Cl 0024+17. The ring-like structure is evident in the blue map of the cluster's dark matter distribution. The map is superimposed on a Hubble image of the cluste

Editor: Jim Wilson NASA Official: Brian Dunbar Last Updated: March 23, 2008 + Contact NASA + SiteMap

話の枕なんだが、先日、若いころ勉強して今でも役立ったのってなんだろと思った。自分なりの結果論は、古典（文献学・聖書学を含む）と語学だろうか。私の場合、どっちもいいかげんなんだが。 他の分野はどうだろうか。数学の基礎的な部分というのは時代とともに変わるということはない。昔勉強した基礎論とかは今ではきちんと思い出せないけど、クルト・ゲーデルの不完全性定理の内容が変わるわけではない。 ルートヴィヒ・ウィトゲンシュタインの「論考」も変わらないが、「哲学探究」や最晩年の思想とかは最新研究で変わる。ハイデガーとかもそう。カール・ポパーの反証可能性議論なんかも最終的な思想とは言い難い云々。哲学系はけっこう時代とともにその受容方法が変わる。 やっかいなのが科学知識だ。科学というのは確かな知識を伝えているかというと、これが基本的にどれも仮説であって、それなりに時代とともに知識をリニューしてないと変わってくる

1. Hubble's View of Jupiter and Europa in August 2020 This latest image of Jupiter, taken by the NASA/ESA Hubble Space Telescope on 25 August 2020, was captured when the planet was 653 million kilometres from Earth. Hubble’s sharp view is giving researchers an updated weather report on the monster planet’s turbulent atmosphere, including a remarkable new storm brewing, and a cousin of the Great Re

Posted by David Pescovitz, June 27, 2006 10:40 PM | permalink Storm chaser Michael Bath has been photographing severe weather for almost twenty years. He's archived hundreds of his beautiful photos of thunderstorms and lightning on his Web site. Michael was also kind enough to prepare a page of tips for those of you who want to take your own lightning photos. This shot was snapped on January 24,

Mike Gwaltney, Principal Office: 615.754.6688 ext. 5805 Email Mr. Gwaltney has been an educator since 1972 and formerly was a teacher, coach, and assistant principal at Mt. Juliet High School prior to becoming the principal at MJMS in 2001.  He holds a Bachelors in Secondary Education and a Masters in Educational Administration.  Joe Eskew, Assistant Principal 7th grade (M-Z), 8th

kitten animals pictures and images of baby animals pictures animals baby animals baby animal images of baby animal kittens puppies kitten cub pictures of baby animals baby animal pictures kittens puppies cub animal pictures February 2nd: New site layout!  Valentine's Day update! The above pictures have been gathered from various sources around the internet using Google Image Search. Many of which

NY Times: Alaska 737 MAX Scheduled for Service Before Blowout