The U.S. Space Force celebrates its fifth anniversary today. The service was formally established on Dec. 20, 2019, when President Donald Trump signed it into law with the National Defense Authorization Act, the bill that allocates U.S. military spending each year. Since then, the U.S. Space Force has grown to nearly 15,000 servicemembers and civilian … Read more
Every year, you can ring in the new year by going out at midnight and finding the dazzling star Sirius, sometimes called the New Year’s Star. In 2025, Sirius will be joined by the bright planets Jupiter and Mars. And of course, the bright constellation Orion the Hunter makes them easy to find. You can’t … Read more
High-energy, powerful, and violent stellar explosions called “superflares” have been found to erupt from stars like the sun roughly once every 100 years, making these blasts far more common than scientists had thought. Solar flares, eruptions of high-energy radiation, can have serious effects on Earth, with the potential to impact communication systems and power infrastructure. … Read more
The Hubble Space Telescope has spent more than thirty years providing some of the most incredible images of the known universe, but it’s only for the last ten that scientists have pointed its gaze at our solar system’s outer planets to observe them like never before. For the past decade, NASA’s Outer Planet Atmospheres Legacy … Read more
In September 2004, NASA’s Genesis return sample capsule tumbled from the sky and slammed into the Utah desert in a remote part of the U.S. Army’s Dugway Proving Ground, shattering the delicate solar wind collectors it carried. The upshot of that downfall: new scientific insights following over 20 years of painstaking work by researchers sorting … Read more