Now, 3D print your own mini universe!

You can now create your mini model of the universe, thanks to scientists who have created a 3D printable map of the oldest light in the cosmos.
The cosmic microwave background (CMB) is a glow that the universe has in the microwave range that maps the oldest light in the universe.
It was imprinted when the universe first became transparent, instead of an opaque fog of plasma and radiation.
The CMB formed when the universe was only 380,000 years old - very early on in its now 13.8 billion-year history.
The Planck satellite is making ever-more detailed maps of the CMB, which tells astronomers more about the early universe and the formation of structures within it, such as galaxies. However, more detailed maps are increasingly difficult to view and explore.

Researchers including Dave Clements from Imperial College London created the plans for 3D printing the CMB.

"Presenting the CMB in a truly 3D form, that can be held in the hand and felt rather than viewed, has many potential benefits for teaching and outreach work, and is especially relevant for those with a visual disability," said Clements.
"Differences in the temperature of the CMB relate to different densities, and it is these that spawned the formation of structure in the universe - including galaxies, galaxy clusters and superclusters," he said.
"Representing these differences as bumps and dips on a spherical surface allows anyone to appreciate the structure of the early universe," Clements said.

"For example, the famous 'CMB cold spot', an unusually low temperature region in the CMB, can be felt as a small but isolated depression," he said.
The CMB can be printed from a range of 3D printers, and two files types have been created by the team: one for simple single-colour structures and one that includes the temperature differences represented as colours as well as bumps and dips.
The study was published in the European Journal of Physics.