http://www.spacehall.com/insider Explore and Discover Thu, 29 May 2008 22:29:11 +0000 http://backend.userland.com/rss092 en The Helix Nebula - a gaseous envelope expelled by a dying star.We have a sufficiently difficult problem to encompass in our imagination the universe known to us. Let us try for a moment to look at that from a far-off point of vantage, with eyes that telescope distances, and with ... http://www.spacehall.com/insider/2008/04/known-universe/ North central portion on the moon; the crater Archimedes on the edge on the Mare Imbrium. Let’s investigate the landscape of the moon. The landscape of the moon is remarkably different from any seen on earth. Only a very few places on earth have features that are at all like those on ... http://www.spacehall.com/insider/2008/04/lunar-landscapes/ Gas plume near the edge of the Orion Nebula. The extent of the universe as we see it through the telescope is inconceivably large, but it is so on account of our experience which is confined to much smaller dimensions. In other words, dimensions are not based on an absolute scale, ... http://www.spacehall.com/insider/2008/04/what-is-in-space/