Computers, Science, & Computer Science

A cross-section of the Universe

heic1408a

claimtoken-5350fc5decc9eAn image of a galaxy cluster taken by the NASA/ESA Hubble Space Telescope gives a remarkable cross-section of the Universe, showing objects at different distances and stages in cosmic history. They range from cosmic near neighbours to objects seen in the early years of the Universe. The 14-hour exposure shows objects around a billion times…

A Study in Scarlet

eso1413a

This new image from ESO’s La Silla Observatory in Chile reveals a cloud of hydrogen called Gum 41. In the middle of this little-known nebula, brilliant hot young stars are giving off energetic radiation that causes the surrounding hydrogen to glow with a characteristic red hue. This area of the southern sky, in the constellation…

Chance Meeting Creates Celestial Diamond Ring

eso1412a

Astronomers using ESO’s Very Large Telescope in Chile have captured this eye-catching image of planetary nebula PN A66 33 — usually known as Abell 33. Created when an aging star blew off its outer layers, this beautiful blue bubble is, by chance, aligned with a foreground star, and bears an uncanny resemblance to a diamond…

What Is Linux?

Tux

Linux is an operating system (OS) for computers, in much the same way as Microsoft Windows (MSW) and Mac OS X are. An operating system is software that runs on a computer, to support applications and control the hardware. Applications are software programs that help you to do useful stuff on the computer, such as…

Galactic Serial Killer

eso1411a

This new image from the MPG/ESO 2.2-metre telescope at ESO’s La Silla Observatory in Chile shows two contrasting galaxies: NGC 1316, and its smaller neighbour NGC 1317. These two are quite close to each other in space, but they have very different histories. The small spiral NGC 1317 has led an uneventful life, but NGC…

First Direct Evidence of Cosmic Inflation

_73634672_73634671

Almost 14 billion years ago, the universe we inhabit burst into existence in an extraordinary event that initiated the Big Bang. In the first fleeting fraction of a second, the universe expanded exponentially, stretching far beyond the view of our best telescopes. All this, of course, was just theory. Researchers from the BICEP2 collaboration today…