In just our observable universe, we estimate there are over 2 trillion galaxies!
, Postdoctoral Research Fellow, Centre for Astrophysics and Supercomputing, Swinburne University of Technology.
Let’s start our universal tour by searching for one of the most visually stunning galaxies out there, the Cartwheel Galaxy. In the Aladin interface, you can search for both the popular name of an object or known coordinates. The location will be centered in the interface. A general rule of thumb as an astronomer is that"color" differences within galaxies are because of physically different environments. It’s important to note that things that look blue are generally hotter than things that look red .
The whole center section of the galaxy seems to “disappear” from our image. This suggests that section is likely home to older stars, with less active Aladin is home to 20 different surveys. They provide imaging of the sky from optical, UV, infrared, X-rays and gamma rays.
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