STEREO Solar Mission News
The latest news from the STEREO solar mission which consists of two space-based observatories – one ahead of Earth in its orbit, the other trailing behind.
Comet C/2025 R3 (PANSTARRS)
22 Apr 2026 at 12:00amSTEREO-A's Heliospheric Imager (HI-2) recently captured a stunning tail disconnection event in comet C/2025 R3 (PANSTARRS). The comet is expected to remain visible to the spacecraft for several more days.
Comet 3I / ATLAS
20 Nov 2025 at 12:00amSTEREO-A observed interstellar comet 3I/ATLAS from Sept. 11 to Oct. 2. STEREO is part of a fleet of NASA spacecraft observing this comet, together providing more information about its size, physical properties, and chemical makeup.
Read more...Mercury Transit
14 Apr 2025 at 12:00amOn April 7th, 2025, the planet Mercury passed between the Sun and the STEREO Ahead spacecraft, casting a shadow onto the telescopes on board. This planetary transit was not visible from Earth. A movie showing the planetfs motion as seen by the EUVI telescope can be seen here.
Read more...STEREO Science Stories
14 Jan 2025 at 12:00amSTEREO is now posting summaries of select papers written using STEREO data. These are written on a level for general scientists. Interested in how STEREO data is used? Take a look at: https://stereo-ssc.nascom.nasa.gov/publications/nuggets.shtml
Read more...Side View of Solar Storms May 9-14, 2024
15 May 2024 at 12:00amSTEREO-A had a unique side view of last weekend's solar storms, observing multiple CME fronts as they headed towards Earth. STEREO-A also gave a heads up on the strength of the storms when they hit the spacecraft over two hours before they reached Earth.
Read more...STEREO-A One of Multiple Spacecraft Telling the Story of a Giant Solar Storm
8 Mar 2024 at 12:00amApril 17, 2021, was a day like any other day on the Sun, until a brilliant flash erupted and an enormous cloud of solar material billowed away from our star. Such outbursts from the Sun are not unusual, but this one was unusually widespread, hurling high-speed protons and electrons at velocities ...
Read more...New STEREO 3D movies
25 Sep 2023 at 12:00amWhen the STEREO mission was first launched in 2006, with the Ahead and Behind spacecraft each put into their own orbits about the Sun, they soon reached a point where the views from the two spacecraft were ideally situated to make 3D stereoscopic images. As the spacecraft continued to separate, ...
Read more...STEREO sees Comet Nishimura
25 Sep 2023 at 12:00amThe recently discovered Comet Nishimura, which has been getting a lot of attention lately, is now visible in STEREO's inner Heliospheric Imager (HI-1) field-of-view. The comet first appeared in the STEREO images on September 17, just a few hours before it made its closest approach to the Sun. A...
Read more...Ham radio operator captures STEREO rotating
16 Aug 2023 at 12:00amAfter 17 years, the STEREO Ahead spacecraft is passing close to Earth again, with closest approach on August 17. As it passes by, the spacecraft has to rotate to keep the high gain antenna pointed at Earth so that communications aren't interrupted. As described in this story on spaceweather.com,...
Read more...After Seventeen Years, A Spacecraft Makes Its First Visit Home
12 Aug 2023 at 12:00amOn Aug. 12, 2023, NASA's STEREO-A spacecraft will pass between the Sun and Earth, marking the first Earth flyby of the nearly 17-year-old mission. The visit home brings a special chance for the spacecraft to collaborate with NASA missions near Earth and reveal new insights into our closest star.
Read more...| STEREO Mission Resources | |||||
|
STEREO Mission |
|||||
