![]() The transmissions of Pioneer 10 encountered one white dwarf star in 2002. The team determined that transmissions to Voyager 2, Pioneer 10, and Pioneer 11 have already encountered at least one star. The Deep Station Network is NASA's international array of giant radio antennas that supports interplanetary spacecraft missions, plus a few that orbit Earth. 'Outward transmissions from DSN travel to the spacecraft and beyond into interstellar space.' These spacecraft have communicated with the Deep Station Network (DSN) radio antennas in order to download scientific data and telemetry data, reads the study published in the journal of the Publications of the Astronomical Society. The study used signals sent from Earth to Voyager 1, Voyager 2, Pioneer 10, Pioneer 11 and New Horizons, mapping out where the signals may have spread out when sent into the universe. The 1997 movie Contact, based on the story by Carl Sagan, tells the story of a SETI scientist who finds evidence of aliens on a distant planet 26 light-years from Earth and chooses to make first contact by sending radio wave signals. Howard Isaacson, a University of California, Berkeley astronomer and co-author, acknowledged the move to PopSci: 'This is a famous idea from Carl Sagan, who used it as a plot theme in the movie Contact.' This signal also reached a star roughly 27 light-years from our planet as transmission spreads out when they contact an object ![]() Teacher's Guide to Using this MissionOverview/background materials, activities, primary sources, and more.In 2002, NASA sent radio wave transmission to the Pioneer 12 probe in a routine protocol to send data and ensure communication is established.About This MissionLearn more about the creation of and team behind City of Immigrants.Release notes for the new City of ImmigrantsInformation on the new, non-Flash version of the game including notes on known bugs.Since they can’t capture the whole story, we encourage you to learn more about this history by checking out the additional resources for each mission. Like any work of history, Mission US games are interpretations of what happened in the past based on careful research. We encourage you to reach out to a parent, teacher, or other adult you trust if you have any questions about the content you encounter in the game. ![]() We think learning about such historical moments is essential for understanding both the past and present. Mission US covers some troubling topics, including racism, injustice, and war, many of which remain challenges today. You will encounter difficult and challenging moments in US history.You can replay the game and make different choices to see how your character’s story might have turned out differently. Some of the choices you make will unlock different badges, which will also impact the outcome of your character’s story in the game epilogue. Like other choose-your-own-adventure stories, the fate of your character is based on your choices in the game. All of the decisions represent real alternatives that people might have encountered. In each mission, you’ll meet a range of people with very different viewpoints, explore historical settings, and witness key past events - and will have to make difficult decisions. The goal of Mission US is to understand history, not to win. (You will also encounter some actual historical figures and witness historical events in the game!) While your character and many of the characters in the game are fictional, they are based on the experiences of real people. In each mission you’ll step into the shoes of a young person during an important time period in US history. Mission US is a role-playing game (RPG).
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