The Two–degree Field Galaxy Redshift Survey was conducted by the Australian Astronomical Observatory with the 3.9 m Anglo–Australian Telescope at Siding Spring Observatory, Australia.
Between 1997 and 2002 the survey determined the large–scale structure of the universe to a depth of around 3.4 billion light years. This map shows 237329 single objects, with each of them representing a galaxy.
The survey covers objects with a redshift average around z = 0.11 where the filamentary structure of the universe with clusters and voids can clearly be seen.
2dFGRS Final Release
Galaxies: 237329 Sky Coverage: 1500 deg2 Median Redshift: 0.11468 equates to ~ 1.57 billion LYs Survey: 1997–2002 Published: 30.06.2003
Telescopes are observing millions of new galaxies every year and the idea of what the universe looks like is constantly evolving. Several deep sky surveys show us, that the space is filled with billions of galaxies forming a global filamentary structure. This website visualizes such cosmic structures in 3D where you can rotate, pan and zoom the map. The animations are based on real data derived from the largest spectroscopic sky surveys ever made: SDSS, 6dFGS, 2dFGRS and DESI.
Astronomical data
The amount of astronomical data is growing rapidly. For example, within the SDSS project the positions and brightnesses of almost 500 million celestial objects were measured. To reduce the amount of data and speed up the loading time in this project not all of these objects are shown. In such cases the objects were selected randomly.
Animation
You may wonder why the galaxies are displayed as little squares instead of dots, circles or even images of the observed galaxies. The reason for this is again to speed up the animation and to shorten running– and loading–times. The colors of the squares ranging from light turquoise over blue to red, yellow and green indicate the distances of the galaxies from earth.
Navigation and Control
Click the buttons on the right to start and stop the automatic rotation, to open and close info boxes, to change between the various surveys and to open this introduction. The animation can be accompanied by music using the audio player at the bottom of the page.
◾ Start and stop rotation.
¡ Open and close info boxes.
1 - 5 Change between different surveys.
? Open this introduction.
Use finger gestures on touch screens or the mouse for control.
. Left mouse button: Rotate map. . Right mouse button: Pan map. . Mousewheel: Zoom in and out.
