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SOHO (SOlar Heliospheric Observatory) is a space-based observatory, viewing and investigating the Sun from its deep core, through its outer atmosphere - the corona - and the domain of the solar wind, out to a distance ten times beyond the Earth's orbit. Data and software for scientific analysis from all SOHO instruments. These data have simple calibration so they are not intended for scientific analysis. More near real time data from SOHO and other sources for a quick look at the Sun and the Heliosphere. Pages located outside the SOHO web site will open a new window. Status updates are provided at SDO's JSOC Emergency Resources page. Regular size page, New 1280×1024 window, and New 1600×1200 window. For details on comets or planets, visit the sungrazer pages. What is space weather ? "Conditions on the Sun and in the solar wind, magnetosphere, ionosphere and thermosphere that can influence the performance and reliability of space-borne and ground-based technological systems and can endanger human life or health." (Click to watch) Also in Quicktime format: Large (269M) and Small ( 60M). Recent Solar Activity. A collection of data and event or feature catalogs from SOHO and other sources. Often used as reference for planning new SOHO observations or, to examine observations based on events or features. • Large Angle Spectrometric Coronagraph (or LASCO) is able to take images of the solar corona by blocking the light coming directly from the Sun with an occulter disk, creating an artificial eclipse within the instrument itself. 25 Years in Space for ESA & NASA's Sun-Watching SOHO (2 December, 2020). Highlights from SOHO's 25 Years in Orbit (2 December, 2020). We are scientists from the Solar and Heliospheric Observatory (SOHO) mission, a satellite that's still studying the Sun after 25 years! Ask us anything about SOHO and solar science. (Reddit AMA) (2 December, 2020). SOHO, the Solar & Heliospheric Observatory, is a project of international collaboration between ESA and NASA to study the Sun from its deep core to the outer corona and the solar wind. SOHO was launched on December 2, 1995. The SOHO spacecraft was built in Europe by an industry team led by prime contractor Matra Marconi Space (now EADS Astrium Launched on December 2, 1995, SOHO was designed to provide continuous observations of the Sun to advance our understanding of solar dynamics, the Sun’s interior, the corona, solar wind, and space weather phenomena. EIT 171: EIT 195: EIT 284: EIT 304: SDO/HMI Continuum: SDO/HMI Magnetogram: LASCO C2: LASCO C3 : Smaller page - Full screen: 1280×1024 and 1600×1200: Click on the images to enlarge them On July 23, 2012, a massive cloud of solar material erupted off the sun's right side, zooming out into space. It soon passed one of NASA's Solar Terrestrial Relations Observatory, or STEREO, spacecraft, which clocked the CME as traveling between 1,800 and 2,200 miles per second as it left the sun. This was the fastest CME ever observed by STEREO. Two other observatories – NASA's Solar 25 Years in Space for ESA & NASA's Sun-Watching SOHO (2 December, 2020). Highlights from SOHO's 25 Years in Orbit (2 December, 2020). We are scientists from the Solar and Heliospheric Observatory (SOHO) mission, a satellite that's still studying the Sun after 25 years! Ask us anything about SOHO and solar science. (Reddit AMA) (2 December, 2020). Solar Pick 2024 TOTAL ECLIPSE (APRIL 8, 2024) The April 8, 2024, total solar eclipse crossed North America, passing over Mexico, the United States, and Canada more » Solar flares are classified using the X-ray brightness (see an explanation here), and "X class" flar Four Lunar Transits April-July 2025 - Sat, 29 Mar. There are lunar transits on April 27, 2025 and April 28, 2025. Here are the movies from the SDO Fli JSOC Repairs are Complete, Normal Data Services have Resumed - Sun, 09 Feb From 1.5 million kilometres away from Earth, the Solar and Heliospheric Observatory (SOHO) constantly watches the Sun, returning spectacular pictures and data of the storms that rage across its surface. NASA's Solar Viewer allows you to see today's images of the Sun on your desktop. These near realtime images come from NASA/ESA's SOHO mission, NASA TRACE mission, and the Big Bear Observatory. Please note: You will need the Yahoo! Widget Engine for Mac or PC. SOHO, the Solar & Heliospheric Observatory, is a project of international collaboration between ESA and NASA to study the Sun from its deep core to the outer corona and the solar wind. SOHO was launched on December 2, 1995. The SOHO spacecraft was built in Europe by an industry team led by prime contractor Matra Marconi Space (now EADS Astrium An unexpectedly strong solar storm rocked our planet on April 23, 2023, sparking auroras as far south as southern Texas in the U.S. and taking the world by surprise. SOHO (Solar and The ESA/NASA Solar and Heliospheric Observatory (SOHO) mission consists of one spacecraft in a halo orbit around the Sun–Earth L1 point. From here, it has an uninterrupted view towards the Sun. SOHO carries twelve instruments but the Large Angle and Spectrometric Coronagraph (LASCO) instrument is now by far the most important instrument. In addition to its scientific mission, it is a main source of near-real-time solar data for space weather prediction. Along with Aditya-L1, Wind, Advanced Composition Explorer (ACE), and Deep Space Climate Observatory (DSCOVR), SOHO is one of five spacecraft in the vicinity of the Earth–Sun L1 point, a point of gravitational balance located approximately 0.99 astronomical unit (AU) from the
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