XDF allows us to explore further back in time than ever before,” said Garth Illingworth of the University of California at Santa Cruz, principal investigator of the Hubble Ultra Deep Field 2009 ...

The more than 5,000 galaxies visible in the Hubble XDF image take up an area of the sky that, from Earth, is less than a tenth of the diameter of the Moon.

Human68k上のファイル・ディレクトリを再帰的に直接XDFファイルにアーカイブするプログラムです。 tar や lha のような感覚で使えます。フロッピーディスクドライブは使いません。 1枚のXDFに収まらない場合は自動的に複数のXDFを作成することもできます。 注意: ...

Astronomers who have studied the XDF believe it reveals faint galaxies that date back approximately 13.2 billion years. In this way, the XDF gives astronomers an idea of what the first small galaxies ...

The XDF is a very small fraction of sky area, but provides a "core sample" of the heavens over 13 billion light-years. Image released Sept. 25, 2012.