The Gaia satellite and its 1 billion pixel camera have since 2013 mapped the Milky Way (and more) and collected data to reveal new information, such as stars we have not seen before. In addition to the location, brightness, distances, and motions of over a billion stars, Gaia's second data set includes color measurements of nearly all star themes, surface temperatures of about 100 million, the effect of interstellar dust at 87 million, and the positions of more than 14,000 known asteroids.
The data of the satellite could occupy the astronomers for years. Scientists are already using it to study the evolution of our galaxy, the gravitational forces in space, and the distribution of dark matter. "Gaia will significantly advance our understanding of the universe on all cosmic scales," said one of the project scientists, Timo Prusti. "Even near the Sun, the region that we thought best understood, Gaia reveals new and exciting features."
In the video below, you can see 960 million of the 1