The European Space Agency has used artificial eclipses for years through missions including SOHO, Solar Orbiter, and Proba-3.
The SWAP extreme-ultraviolet telescope on Proba-2 captured the solar disc and low corona, while the LASCO C2 coronagraph on SOHO captured the outer corona, and Proba-3's ASPIICS coronagraph provided detailed imagery of the inner corona.
An international rescue team worked for three months to locate and recover SOHO after it lost contact.
SOHO discovered its 5000th comet in March 2024, making it the most prolific comet discoverer in history.
ESA's upcoming Vigil mission will be the first to monitor the Sun from the side, detecting solar storms before they reach SOHO's line-of-sight.
SOHO experienced a critical error two-and-a-half years after its launch, causing it to spin out of control and lose contact with Earth.
SOHO's data shows that solar extreme ultraviolet radiation influences Earth's upper atmosphere but is not a direct driver of global warming trends.
The 'Promoting Research and Observations of Space Weather to Improve the Forecasting of Tomorrow' (PROSWIFT) act was signed into U.S. law in October 2020, specifically mentioning SOHO's LASCO instrument.
SOHO frequently contributes to multipoint measurements for missions like Solar Orbiter and NASA's Parker Solar Probe.
The observations from SOHO have provided valuable data on the movement, composition, and dust production of comets.
SOHO's technological success has influenced the next generation of solar observatories, including ESA's Solar Orbiter and NASA's Solar Dynamics Observatory.
SOHO is located 1.5 million km away from Earth, providing uninterrupted views of the Sun.
SOHO is one of the longest-operating space missions of all time.
In November and December 1998, SOHO's stabilizing gyroscopes failed, and by February 1999, new software allowed it to operate without them.
NASA's Solar Dynamics Observatory carries improved versions of SOHO's instruments.
SOHO provided the first images of plasma flows beneath the Sun's surface early in its mission.
CCOR-2 refreshes the observational backbone as LASCO on SOHO is nearly 30 years old.
SOHO is the longest-lived Sun-watching satellite and has been operational for over 25 years.
The Solar and Heliospheric Observatory (SOHO) has been operating at L1 since 1995 and is a joint project of ESA and NASA.
The Solar and Heliospheric Observatory (SOHO) has been operating at the Earth–Sun Lagrange Point 1 since 1995 and is likely to stop providing imagery of coronal mass ejections by 2025.