What is a graviton?

If you've read anything about physics, then you will read many words ending with "ON" words like proton, neutron, gluon, photon, boson, fermion and on and on and on ... One of the words with which you might have found it "graviton". Let's be clear: At the moment, the graviton is a purely theoretical concept that walks the edge of the boundary between the domains of science and speculation seriously.

The polar ring galaxy NGC 660

This symphony data of broadband and narrowband, obtained by the Gemini North telescope on Mauna Kea, shows the galaxy NGC 660. Besides being a 20 million light years away and within the limits of the constellation Pisces, the unusual aspect of NGC 660 is identified as a polar ring galaxy.

The polar ring galaxies, rare galaxies have a substantial population of stars, gas and dust orbiting in rings nearly perpendicular to the plane of the galactic disk. 

NASA and ESA are trying a new interplanetary Internet

NASA and the European Space Agency (ESA) have success an experimental version of interplanetary Internet to control the educational robot astronauts to the International Space Station. Used in the experiment, a new protocol developed by NASA Disruption Tolerant Networking (DTN) allowed to send messages and demonstrated that once between spacecraft can create a network of information sharing, such terrestrial Internet.