Say you're an alien civilization with advanced technology looking to communicate with other civilizations throughout the Milky Way galaxy.
The galactic center – that crowded, fascinating region around supermassive
Sagittarius A* – is one of the best spots in the Milky Way for sending sweeping, repeating radio signals out to whoever might be listening. That's according to a team of scientists led by astronomer Akshay Suresh of Cornell University, who haveThe Breakthrough Listen Investigation for Periodic Spectral Signals project is designed to seek and amplify strangely pulsed radio emission from the galactic center that may be messages from extraterrestrial intelligences.Suresh explainsThe galactic center is a very hectic place, filled with all sorts of stars, and thick clouds of dust and gas that obscure much of whatever is in there.
Periodic pulsed beacons would be an inexpensive way of transmitting signals across vast tracts of interstellar space. Here on Earth, we use pulsed signals for applications such as remote radar sensing and aircraft navigation, but scaled up by sufficiently advanced technology, they could be sent much farther.
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