Space Exploration

chronicles solar activity from Aug. 12 to Dec. 22, 2022, as captured by NASA’s Solar Dynamics Observatory (SDO). From its orbit in space around Earth, SDO has steadily imaged the Sun in 4K x 4K resolution for nearly 13 years. This information has enabled countless discoveries about the workings of our closest star and how it influences the solar system. With a triad of instruments, SDO captures an image of the Sun every 0.75 seconds. The Atmospheric Imaging Assembly (AIA) instrument alone captures images every 12 seconds at 10 different wavelengths of light. This 133-day time-lapse showcases photos taken at a wavelength of 17.1 nanometers, which is an extreme-ultraviolet wavelength that shows the Sun’s outermost atmospheric layer: the corona. Compiling images taken 108 seconds apart, the movie condenses 133 days, or about four months, of solar observations into 59 minutes. The video shows bright active regions passing across the face of the Sun as it rotates. The Sun rotates approximately once every 27 days. The loops extending above the bright regions are magnetic fields that have trapped hot, glowing plasma. These bright regions are also the source of solar flares, which appear as bright flashes as magnetic fields snap together in a process called magnetic reconnection. While SDO has kept an unblinking eye pointed toward the Sun, there have been a few moments it missed. Some of the dark frames in the video are caused by Earth or the Moon eclipsing SDO as they pass between the spacecraft and the Sun. Other blackouts are caused by instrumentation being down or data errors. SDO transmits 1.4 terabytes of data to the ground every day. The images where the Sun is off-center were observed when SDO was calibrating its instruments. SDO and other NASA missions will continue to watch our Sun in the years to come, providing further insights about our place in space and information to keep our astronauts and assets safe. The music is a continuous mix from Lars Leonhard’s “Geometric Shapes” album, courtesy of the artist. Credit: NASA's Goddard Space Flight Center Scott Wiessinger (PAO): Lead Producer Tom Bridgman (SVS): Lead Visualizer Scott Wiessinger (PAO

On Dec. 5, NASA will air the lunar flyby of the Orion spacecraft on its return trek toward Earth. Orion completed a burn on Dec. 1 to exit a lunar orbit thousands of miles beyond the Moon, where engineers have been testing systems to improve understanding of the spacecraft before future missions with astronauts. The return-powered flyby burn, in which the spacecraft will harness the Moon’s gravity and accelerate back toward Earth, is expected at 11:43 a.m. (1643 UTC) The spacecraft is expected to fly about 79 miles above the lunar surface at 11:42 a.m. (16:42 UTC) just before the burn. Orion launched aboard the Space Launch System (SLS) rocket at 1:47 am EST (0647 UTC) on Nov. 16 from historic Launch Complex 39B at NASA’s Kennedy Space Center. Orion entered a distant retrograde orbit at 4:52 p.m. EST (2152 UTC) on Nov. 25, where the spacecraft has been testing systems in a deep space environment. The Artemis I mission is the first integrated test of NASA’s deep space exploration systems: the Orion spacecraft, the SLS rocket, and Kennedy Space Center ground systems.