Researchers compile largest Milky Way photo with 46 billion pixels


Share post:

Astronomers at the Ruhr-Universität Bochum have compiled the largest astronomical image to date. The picture of the Milky Way contains 46 billion pixels. In order to view it, researchers headed by Prof Dr Rolf Chini from the Chair of Astrophysics have provided an online tool. The image contains data gathered in astronomical observations over a period of five years.

Researchers compile largest Milky Way photo with 46 billion pixels
A small section of the Milky Way photo showing the M8 nebula 
[Credit: Copyright Chair of Astrophysics, RUB]

Five-year observation period at the university observatory

For five years, the astronomers from Bochum have been monitoring our Galaxy in the search of objects with variable brightness. Those objects may, for example, include stars in front of which a planet is passing, or multiple systems where stars orbit each other and which obscure each other every now and then. In his PhD thesis, Moritz Hackstein is compiling a catalogue of such variable objects of medium brightness. For this purpose, the team from the Chair of Astrophysics takes pictures of the southern sky night after night. To this end, they use the telescopes at Bochum’s university observatory in the Atacama Desert in Chile. More than 50,000 new variable objects, which had hitherto not been recorded in databanks, have been discovered by the researchers so far.

268 individual images make up the photo of the Milky Way

The area that the astronomers observe is so large that they have to subdivide it into 268 sections. They photograph each section in intervals of several days. By comparing the images, they are able to identify the variable objects. The team has assembled the individual images of the 268 sections into one comprehensive image. Following a calculation period of several weeks, they created a 194 Gigabyte file, into which images taken with different filters have been entered.

Online tool facilitates search for individual celestial objects

Using the online tool, any interested person can view the complete ribbon of the Milky Way at a glance, or zoom in and inspect specific areas. An input window, which provides the position of the displayed image section, can be used to search for specific objects. If the user types in “Eta Carinae,” for example, the tool moves to the respective star; the search term “M8” leads to the lagoon nebula.

View the Milky Way photo:

Source: Ruhr-Universitaet-Bochum [October 21. 2015]



Related articles

Roman-era theatre to open to public soon

A Roman theatre dating back almost two millennia will soon open to tourist visits in Turkey's Bursa’s İznik...

‘Living fossil’ genome decoded

A group of scientists from Okinawa Institute of Science and Technology Graduate University (OIST), Nagoya University, and the...

500-year-old mummy found in northern Lima

Archaeologists in Peru announced Tuesday the discovery of the 500-year-old mummified remains of a woman from the pre-Columbian...

Cassini sees Titan cooking up smog

A paper published this week using data from NASA's Cassini mission describes in more detail than ever before...

Climate change: How does soil store CO2?

Previous studies have established that carbon binds to tiny mineral particles. In this latest study, published in Nature...

African savannah – and its lions – declining at alarming rates

About 75 percent of Africa's savannahs and more than two-thirds of the lion population once estimated to live...

More on New species of duckbilled dinosaur discovered

A previously undiscovered dinosaur species, first uncovered and documented by an adjunct professor at Montana State University, showcases...

Phoenix Cluster sets record pace at forming stars

Astronomers have found an extraordinary galaxy cluster, one of the largest objects in the universe, that is breaking...