SOHO News

Solar and Heliospheric Observatory

12/01/2015 07:01 PM
SOHO's 20th Birthday
SOHO was launched on 2 December 1995, for what was originally planned as a two-year mission. Twenty years later, it's still going strong.

11/03/2015 07:31 AM
SOHO featured in the APOD
SOHO is featured in the Astronomy Picture of the Day.

09/15/2015 11:38 AM
SOLAR PICK: SOHO COMET CONTEST WINNERS
We are pleased to announce the winner and runner-ups in our SOHO 3000th comet contest. The entries had to guess the time and date of perihelion (closest approach to the Sun) of our 3000th comet discovery...

09/15/2015 11:38 AM
HOTSHOT: SOHO'S 3000TH COMET
On Sept. 13, 2015, the Solar and Heliospheric Observatory -- a joint project of the European Space Agency and NASA -- discovered its 3,000th comet, cementing its standing as the greatest comet finder of all time.

12/31/1969 07:00 PM
SOLAR PICK: HERE COMES THE SUN
The Solar and Heliospheric Observatory (SOHO) has been watching the Sun for almost 20 years. In that time it has seen solar activity ramp up and...

12/31/1969 07:00 PM
SOLAR PICK: BRIGHT FILAMENT ERUPTION
An elongated solar filament that extended almost half the Sun's visible hemisphere erupted into space (Apr. 28-29, 2015) in a large burst of bright plasma.

12/31/1969 07:00 PM
SOLAR PICK: SOURCE OF ST. PATRICK'S DAY AURORA
Most of the energy that generated the most powerful geomagnetic storm of this solar cycle on March 17-18, 2015 came from this fast-moving, Earth-directed coronal mass ejection (CME)

12/31/1969 07:00 PM
SOHO HOTSHOT: SOHO's 3000th Comet Contest
SOHO is approaching the date when its images will reveal its 3000th comet, a record-extending achievement. So we are offering everyone an opportunity to guess when this will happen...

12/31/1969 07:00 PM
PICK OF THE WEEK: SOHO Comet 2875
An unusual comet is skirting past the Sun (Feb.18-20, 2015). "It's a 'non-group comet,' meaning that it does not appear to be related to any other comet or comet family that we have on record," explains...

12/31/1969 07:00 PM
PICK OF THE WEEK: FAR-SIDE HALO OUTBURST
The Sun blew out a powerful coronal mass ejection (CME) from just around the edge of the Sun...

12/31/1969 07:00 PM
PICK OF THE WEEK: EARTH-DIRECTED X-CLASS FLARE AND CME
An active region just about squarely facing Earth erupted with an X 1.6 flare (largest class) as well as a coronal mass ejection (CME)...

12/31/1969 07:00 PM
PICK OF THE WEEK: PROTON STORM SURGE
A far-side powerful flare erupted and triggered a huge and long-lasting proton storm that flew...

12/31/1969 07:00 PM
PICK OF THE WEEK: MAGNIFICENT BLAST
STEREO (Behind) captured this magnificent coronal mass ejection (associated with an M-class flare) that flung a long stream of plasma...

12/31/1969 07:00 PM
PICK OF THE WEEK: Planets in Conjunction
At their closest approach, these two bright planets, Mercury and Jupiter, were less than

12/31/1969 07:00 PM
PICK OF THE WEEK: Comet Jacques
STEREO has observed the recently discovered Comet Jacques as it passed by its nearest approach to the Sun