Articles tagged "soho"


SOHO celebrates its 20th anniversary of gazing into the Sun

Today marks the 20th anniversary of NASA/ESA Solar and Heliospheric Observatory (SOHO). Originally planned for two-year mission, the project has now almost gone strong for two full solar-cycles, making the project longest Sun watching satellite to this day. When...

December 02, 2015


SOHO discovers its 3000th comet

The Solar and Heliospheric Observatory (SOHO) detected its 3000th comet on September 13, 2015. The newest discovery confirmed SOHO's reputation for being the greatest comet finder in the history so far.SOHO is a joint project of the European Space Agency and NASA on

September 15, 2015

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It's alive!

Just as we all accepted that the Comet ISON has most likely disintegrated under the high heat and gravitational stress of the Sun, amazing sungrazer came ALIVE, gaining more brightness. Thousands watched ISON's journey through the solar system and its unusual

November 29, 2013


Watch Comet ISON live - Solar observatories schedule

On November 28, 2013 at 18:44 UTC Comet ISON will reach its perihelion and fly by about 1.2 million km (730 000 miles) above the solar surface​. Since space-based solar observatories will be recording its passage just follow the links and timetable below for

November 27, 2013


Multiple views of solar activity - illustration

SOHO's latest "Picture of the week" edition released great graphic illustration of combination of Sun-observing spacecrafts coverage of solar events. From their positions near the Sun-Earth line, SDO and SOHO observed small CME on July 4, 2013. At

July 20, 2013

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Large prominence eruption and strong C-class solar flare

Strong solar flare erupted on May 9, 2013 at 22:52 with peak at 23:15 UTC as C9.1 flare, just below M-class threshold. The event was centered around old returning Sunspot 1726. It will be on the visible solar disk in the next 24 hours when it will be designated as

May 10, 2013


Prominence eruption and CME on May 1, 2013 captured by SOHO, STEREO and SDO spacecrafts

On May 1, 2013, Active Region just around the left edge of the Sun erupted with a huge coronal mass ejection (CME). The video bellow shows combined imagery from NASA’s SDO, SOHO and STEREO heliophysics fleet. Solar Dynamics Observatory (SDO) provided a

May 07, 2013


Solar missions to observe comet ISON (How to track ISON on SOHO and STEREO imagery)

Comet ISON is on a journey through our solar system that will culminate in its close encounter with the Sun on November 28, 2013. At that time the comet will pass at a distance of only 2.7 solar radii from the Suns center. Comet C/2012 S1, named ISON, was

April 23, 2013


NASA | Why are we seeing so many sungrazing comets?

Before 1979, there were less than a dozen known sungrazing comets. As of December 2012, we know of 2,500. Why did this number increase? With solar observatories like SOHO, STEREO, and SDO, we have not only better means of viewing the sun, but also the comets that

December 30, 2012


SOHO's Greatest Hits - Volume 7

The following images are compilations of the best anomalies found from the SOHO probe by SolarWatcher. 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

December 30, 2012

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JHelioviewer software: A different way to watch the Sun

JHelioviewer is visualization software that enables everyone, anywhere to explore the Sun. Developed as part of the ESA/NASA Helioviewer Project, it provides a desktop program that enables users to call up images of the Sun from the past 15 years. Software contains

November 24, 2012


What is happening with solar observing instruments right now?!

While trying to access SOHO's coronograph data we noticed that the latest LASCO C2 image is updated on August 18 at 13:36 and LASCO C3 at 13:30. Also, SOHO's EIT 304 latest image is from August 17 at 13:19, EIT 195 is from August 16 at 13:13 while EIT 171 and 284 show

August 19, 2012


Comet 96P/Machholz visible on SOHO's LASCO C3 between July 12 - 17

Comet 96P/Machholz will next come to perihelion on July 14, 2012. Between July 12-17, 2012, comet Machholz will be visible in the SOHO LASCO/C3 field of view and will brighten to about magnitude +2.  It should be visible from both STEREO A and B between July

July 05, 2012

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SOHO fully operational again on May 11, 2012

SOHO is back up and running after what officials call "a technical glitch" temporarily sidelined the observatory for just over a week.The Solar and Heliospheric Observatory (SOHO), which is jointly managed by NASA and the European Space Agency continued sending

May 12, 2012


Note for Solarwatchers: SOHO EIT is in "the keyhole"

We recieve lots of questions from our readers considering SOHO EIT data. SOHO's near-real time images from EIT instruments stop uploading in January 6, however there is nothing wrong with SOHO instruments  because EIT is in a telemetry keyhole. The lack of fresh

January 12, 2012


Significant CME heading toward Mars

A significant CME blasted off the sun today, Oct. 22nd, around 1100 UT. Analysts at the Goddard Space Weather Lab say the cloud is heading for Mars, due to hit the Red Planet on Oct. 26th.  (movie, forecast track)While looking at the latest STEREO Ahead images,

October 22, 2011

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Sundiving comet recorded by Lasco C3

Sundiving or Sun-Grazing comet has been found on the Soho Lasco C3 instrument during October 18th. Impact is expected late Oct 19th or early Oct 20th. Here is the video by SolarWatcher recorded from SOHO Lasco C3 instruments:The Sun is pretty quiet for now

October 19, 2011


Double eruption on Sun

On October 1st around 10:17 UT, widely-spaced sunspots 1302 and 1305 erupted in quick succession, revealing a long-distance entanglement which was not obvious before. NASA's Solar Dynamics Observatory (SDO) recorded the movie of the double blast:Since it was

October 02, 2011

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Sundiving comet

A comet is diving into the sun today. Discovered on Sept. 29th by a group of four independent comet hunters (M. Kusiak, S. Liwo, B. Zhou and Z. Xu), the icy visitor from the outer solar system is evaporating furiously as it approaches the hot star. SOHO (the Solar and

October 01, 2011


Solar wind blasts Mercury

At a NASA teleconference yesterday, researchers working with data from the Messenger spacecraft offered new evidence that gusts of solar wind are penetrating Mercury's magnetic field and eroding material off the planet's surface. The spacecraft has actually flown

September 30, 2011

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Real facts about comet Elenin statement by Leonid Elenin

SpaceObs, website run by Leonid Elenin, the most mysterious amateur astronomer that discovered Comet C/2010 X1 or Comet Elenin.Elenin was visible on STEREO A HI1 from September 6th to the 22nd where it then moves out of the field of view.  To see it you need to

September 27, 2011


STEREO-SOHO detected six coronal mass ejections

On Sept. 19th, the STEREO-SOHO fleet of spacecraft surrounding the sun detected six coronal mass ejections (CMEs). Two of the clouds rapidly dissipated. The remaining four, however, are still intact and billowing through the inner solar system. Click to view a movie of

September 20, 2011


Kreutz sungrazing comet seen diving into Sun

On September 14, the Solar and Heliospheric Observatory (SOHO) watched what happened when one comet got too close. Click on the arrow to play a 6-hour time lapse movie: One icy comet went in, none came out. Discovered on Sept. 13th by Michal Kusiak of Poland and...

September 15, 2011


New sunspots forming, Venus-directed CME

Yesterday, the Solar and Heliospheric Observatory witnessed a spectacular explosion on the sun that seemed to pass perilously close to Venus.As the movie shows, the CME passed harmlessly. There was no collision, and it wasn't even close. Although Venus seems to be

August 17, 2011


Another M-class solar flare

A second M-Class flare, this time a M2.5 took place at 03:54 UTC Tuesday morning around Sunspot 1263. This is in addition to the earlier M3.5 flare which we reported yesterday. The first flare produced a small, but fast moving (2010 km/s) Coronal Mass Ejection...

August 09, 2011


Strong solar activity - M9.3 solar flare took place, expecting CMEs

Sunspot 1261 is at it again, this time producing a strong M9.3 Solar Flare at 03:57 UTC Thursday morning. It also turns out that yet another Coronal Mass Ejection (CME) was produced and you can see it in the still image below captured by STEREO Ahead.Proton Levels are o

August 04, 2011


M1.4 Earth-directed solar flare took place

Magnetic fields above sunspot 1261 erupted this morning at 0648 UT, producing an M1-class solar flare. The blast also hurled a bright coronal mass ejection toward Earth. This movie from the STEREO-Ahead spacecraft shows the cloud racing away from the sun at almost

August 02, 2011


Sundiving comet

During the late hours of July 5th, an unnamed icy comet from the outer solar system dove into the sun and disintegrated. Click on the arrow to witness the death plunge recorded by coronagraphs onboard the Solar and Heliospheric Observatory (SOHO):Over the years,

July 06, 2011


M1.3 solar flare ejected, CME arrives on June17th

On June 14th around 08:10 UTC, a magnetic filament near the sun's eastern limb became unstable and erupted. The resulting blast hurled a bright and massive CME into space: The expanding cloud was observed by 3 spacecraft: STEREO-A, STEREO-B and SOHO....

June 15, 2011