sorae14 日
花のような美しさの楕円銀河「NGC 474」 すばる望遠鏡が撮影
こちらは「うお座（魚座）」の方向約1億光年先の楕円銀河「NGC 474」です。楕円銀河といえば一般的に渦巻腕（渦状腕）のような目立つ構造がみられない銀河ですが、NGC ...
Numismatic News13年
NGC debuts online coin research tool
Numismatic Guaranty Corporation has announced the release of what it calls the most comprehensive online reference for U.S. coins today. The new NGC Coin Explorer is a free research tool designed as a ...
Numismatic News15年
NGC introduces verification tool
Numismatic Guaranty Corporation introduced a new tool on its Web site to verify the certification information of all NGC-certified coins, it announced April 2. When available, enlargeable images of ...