Answer:
(1) 1915
(2) Proxima b was first detected four years ago by an older spectrograph, HARPS ("High Accuracy Radial Velocity Planet Searcher"), which is installed on a scope at ESO's La Silla Observatory in Chile But with these newer observations, scientists have an updated, ultra-precise view of the planet.
(3) Researchers from Penn State University are examining a signal that was detected by a radio telescope pointed at Proxima Centauri. ... The sixty-four-meter radio telescope at Parkes Observatory in Australia was used to detect the potential signals from Proxima Centauri.
(4) The sixty-four-meter radio telescope at Parkes Observatory in Australia was used to detect the potential signals from Proxima Centauri. He told the New York Times that the signal appears to only shop up in their data when they are looking in the direction of Proxima Centauri
(5) Spacecraft Made from Ultra Thin Foam Could Reach Proxima Centauri in Just 185 Years. A hypothetical spacecraft made from an extremely thin layer of a synthetic foam could technically make it to our closest neighboring star Proxima Centauri in just 185 years, scientists have said.
(6) A spacecraft with a shell 1 micrometer thick that was released far closer to the sun—0.04 AU, or around 3.7 million miles—could pick up a speed of almost 6,900 kilometers per second (4,300 miles per second)," the team wrote. This would allow it to reach Proxima Centauri in around 185 years.\
(7) If humans are ever to colonize the galaxy, we will need to make the trip to a nearby star with a habitable planet. Last year, astronomers raised the possibility that our nearest neighbor, Proxima Centauri, has several potentially habitable exoplanets that could fit the bill. Proxima Centauri is 4.2 light-years from Earth, a distance that would take about 6,300 years to travel using current technology. Such a trip would take many generations. Indeed, most of the humans involved would never see Earth or its exoplanet counterpart. These humans would need to reproduce with each other throughout the journey in a way that guarantees the arrival of a healthy crew at Proxima Centauri.
Explanation: